Answers:
radius = 6326 kmdistance from north pole to equator = 1582 kmThese values are approximate
=============================================================
Explanation:
The circumference formula is
C = 2*pi*r
which rearranges to
r = C/(2pi)
when solving for r.
Plug in the given circumference to find that
r = C/(2pi)
r = (39,750)/(2pi)
r = 6,326.40898790283
For the sake of the most accuracy possible, I'm using my calculator's stored version of pi (and not something like pi = 3.14); if your teacher requires you to use pi = 3.14 then follow those instructions of course.
The radius is roughly 6326 km when rounded to the nearest integer.
Keep in mind that the earth isn't a perfect sphere, but rather a slightly squished one. This means the earth is slightly fatter than it is tall. However, for the sake of this problem, we'll assume it's a sphere.
------------------------
Once you determine the circumference, aka distance around the circle, we can figure out the next problem: determining the distance from the north pole to the equator. This distance runs along a line of longitude, so it's a north-south distance.
Again, imagine the earth is a perfect sphere. This means that the equator circumference is the same as the circumference as a full longitude line when we travel the globe only along that line. In other words, start at the north pole, travel along that specific longitude only until you reach the south pole. Then staying on that line, travel back to the north pole going around the backend of the earth.
That full circular path we traveled will get cut into 1/4 because 1/2 the circumference is the portion from north to south pole, and then we cut that distance in half when going from north pole to the equator.
(1/4)*(6,326.40898790283) = 1,581.6022469757
That rounds to 1582 km
------------------------
Side notes:
39750 km = 24700 miles (approximate)6326 km = 3931 miles (approximate)1582 km = 983 miles (approximate)To convert from km to miles, you divide by roughly 1.609344which statement is true about finding the midpoint between two points located on a horizontal or vertical line ?
A . When finding the midpoint between two points on a vertical line, keep the y-coordinate and find the average of the x-coordinate
B . When finding the midpoint between two points on vertical line, keep x-coordinate and find the average of the y-coordinates
C . When finding the midpoint between two points on a horizontal line, the x-coordinate is always 0 and the y-coordinates are averaged
D. When finding the midpoint between two points on a horizontal line , the y-coordinate is always zero and the x-coordinates are averaged
Answer: B. When finding the midpoint between two points on a vertical line, keep the x-coordinate and find the average of the y-coordinates
evaluate 3^2*5^5*3^3*5^3/3^4*3^4
\( \frac{{3}^{2} \times {5}^{5} \times {3}^{3} \times {5}^{3} }{ {3}^{4} \times {3}^{4} } \\ = \frac{ {3}^{5} \times {5}^{8} }{ {3}^{8} } \\ = \frac{ {5}^{8} }{ {3}^{3} } \\ = \frac{390625}{27} \\ = 14467.592592......\)
This is the solution.
5. Antonio likes to ride his bike. He can ride from his
house to school in 5 minutes, from school to DJ's
house in 7 minutes, from DJ's house to the mall in
6 minutes, and from the mall to his house in
3 minutes. How long will it take Antonio to ride
from school to the mall if he rides by DJ's house?
The time that it will take Antonio to ride from school to the mall if he rides by DJ's house will be 13 minutes.
How to calculate the time?It should be noted that Antonio can ride from his
house to school in 5 minutes, from school to DJ's
house in 7 minutes, from DJ's house to the mall in
6 minutes, and from the mall to his house in
3 minutes.
Therefore, the time that it will take Antonio to ride from school to the mall if he rides by DJ's house will be:
= School to DJ + DJ to the mall
= 7 minutes + 6 minutes
= 13 minutes
Therefore, the time that it will take Antonio to ride from school to the mall if he rides by DJ's house will be 13 minutes.
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The class midpoint for the class 23 - 29 is
The midpoint is 26.
Midpoint in this scenario = mean
(23+29)/2 = 26
Answer:
-6
Step-by-step explanation:
sin 0 =(8)/(9), tan 0 >0
find sec 0
Answer:
\(\displaystyle \sec(\theta)=\frac{9\sqrt{17}}{17}\)
Step-by-step explanation:
We are given that:
\(\displaystyle \sin(\theta)=\frac{8}{9}\text{ and } \tan(\theta)>0\)
And we want to find sec(θ).
First, note that both sine and tangent are positive. The only quadrant in which this can occur is QI. Hence, all trig ratios will be positive.
Also, recall that sine is the ratio of the opposite side to the hypotenuse. Using this information and the Pythagorean Theorem, we can determine the adjacent side:
\(a=\sqrt{9^2-8^2}=\sqrt{17}\)
So, with respect to θ, the adjacent side is √(17), the opposite side is 8, and the hypotenuse is 9.
Secant is the ratio of the hypotenuse to the adjacent. Hence:
\(\displaystyle \sec(\theta)=\frac{9}{\sqrt{17}}=\frac{9\sqrt{17}}{17}\)
Again, since θ is in QI, all trig ratios are positive.
Sandy made several investments. She bought 1000 shares of a company's stock for $8.60/share, she bought
a bond with a face value of $2500 and a coupon rate of 7%, and she invested $5000 into a fund that is
expected to grow by 3.5% per year.
(b) The bond Sandy purchased will mature in 10 years. How much interest will she receive
semiannually
(c) How long will it take the fund she invested in to be worth $10,000?
(d) Sandy's gross annual income is $51,350. She is paid biweekly and has 5% deducted from her
paycheck for her 403(b). Her employer matches her deduction, up to 4%. How much is deposited into
Sandy's 403(b) each payday?
Answer:
b) The bond Sandy purchased has a face value of $2500 and a coupon rate of 7%. The coupon rate is the interest rate paid on the bond, which is typically paid semiannually. To find how much interest Sandy will receive semiannually, we can use the formula:
Interest = Face value x Coupon rate / 2
Interest = $2500 x 7% / 2 = $87.50
So Sandy will receive $87.50 in interest semiannually from the bond.
c) The fund Sandy invested in is expected to grow by 3.5% per year. To find how long it will take for the fund to be worth $10,000, we can use the formula:
Future value = Present value x (1 + Interest rate)^Years
We can solve for Years by dividing both sides of the equation by the present value and taking the natural logarithm of both sides:
Years = ln(Future value/Present value) / ln(1 + Interest rate)
Years = ln(10000/5000) / ln(1.035)
Years = 7.19
Therefore, the fund will take about 7.19 years to be worth $10,000.
d) Sandy's gross annual income is $51,350. She is paid biweekly, and 5% of her paycheck is deducted for her 403(b). Her employer matches her deduction, up to 4%. To find how much is deposited into Sandy's 403(b) each payday, we can use the following formula:
Contribution = (Gross pay x Contribution rate) + (Employer match x Employee contribution)
Gross pay = $51,350/26 (for bi-weekly paycheck) = $1977.50
Contribution = ($1977.50 x 5%) + ($1977.50 x 5% x 4%) = $98.87
So, $98.87 is deposited into Sandy's 403(b) each payday.
Find the missing side in the right triangle. Round to the nearest hundredth.
14
9
х
Answer:
hope it helps it is donr by using pythogorous theorem
The third side of the right triangle is 10.72 unit.
What is Pythagoras theorem?Pythagoras' Theorem states that the square of the hypotenuse side in a right-angled triangle is equal to the sum of the squares of the other two sides.
Given, the side of right triangle is;
Let H be hypotenuse = 14
And P be perpendicular = 9
Then to find third side base be B,
we use the Pythagoras theorem;
(H)² = (P)²+(B)²
Rearranging,
(B)² = (H)² - (P)²
(B)² = (14)² - (9)²
(B)² = 196 - 81
(B)² = 115
B = 10.72 unit.
Therefore, the third side is 10.72 unit.
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do the two trapezoids in the figure appear to be similar? why or why not?
Answer:
The answer is D cuz two if the corresponding angles are congruent.
A study is conducted to determine how playing a sport affects a student's overall health and well-being. The study includes 100
high school students on various sports teams. The study includes a survey composed of 5 statements to which students
respond on a scale of 1-5. A response of 5 indicates strong agreement with the statement and a response of 1 indicates
strong disagreement with the statement. The results of the statement, "Participating in a sport helps to improve a person's
ability to prioritize his or her free time," shows an average response score of 3.2 and a standard deviation of 1.2. One
conclusion in the report of the study states that participation in sports markedly improves a student's ability to make good use
of free time.
Which statements regarding the report are true?
Select each correct answer.
A)The report should be considered accurate only if the sample is a stratified sample of students playing sports.
The study is biased since the survey includes only students playing a sport so the report should not be considered
accurate.
B)The report accurately states the results because a mean score of 3.2 is greater than the predicted average of 3 on
the statement regarding prioritizing free time.
C)The report does not accurately interpret the result of the statement regarding prioritizing free time.
D)The report of the study should state that there is a strong correlation between participation in sports and ability to
prioritize free time rather than make a broad conclusion.
The requried, correct statment is shown below,
B) The report accurately states the results because a mean score of 3.2 is greater than the predicted average of 3 on the statement regarding prioritizing free time.
C) The report does not accurately interpret the result of the statement regarding prioritizing free time.
D) The report of the study should state that there is a strong correlation between participation in sports and the ability to prioritize free time rather than make a broad conclusion.
Statement A is not true as it suggests a specific sampling method is necessary for accuracy, which is not necessarily the case. The study can still be accurate if the sample is randomly selected and sufficiently large.
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PLEASE HELP FAST!! IT IS URGENT!!
Becky and Carla take an advanced yoga class. Becky can hold 29% of her poses for over a minute, while Carla can hold 35% of her poses for over a minute. Suppose each yoga student is asked to hold 50 poses. Let B = the proportion of poses Becky can hold for over a minute and C = the proportion of poses Carla can hold for over a minute. What iS the probability that Becky's proportion of poses held for over a minute is greater than Carla's? Find the z-table here.
O 0.159
O 0.259
O 0.448
O 0.741
Step-by-step explanation:
The probability that Becky's proportion of poses held for over a minute is greater than Carla's is 0.741.
This can be determined by using the z-table, which shows the probability that a random variable is in the range that is a certain distance away from the mean.
In this case, we are looking at the probability that a random variable is greater than C, so we use the z-value for 0.741.
How many years is 10000 hours? [365 days = 1.0 year] *
There is 24 hours in a day. Therefore, there are 8760 hours in a 365-day calendar year (365 x 24 = 8760).
How many years is 10000 hours?
Take the total number of hours and divide it by the number of hours in a year.
10000/8760 = 1.1415
Therefore, 10000 hours is approximately 1.14 of a year.
a car can travel 476 miles on 14 gallons of gas. write an equation relating the distance to the number of gallons. how many gallons of gas does this car need to travel 578 miles .
6A. what is the equation?
6B. how many gallons of gas does this car need to travel 578 miles?
For what values of theta do maximum r-values occur on the graph the polar equation r = 2 cos4 theta? Note that the maximum r-value occurs at a point that is the maximum distance from the pole
Answer:r=2 cos^4(theta)
Step-by-step explanation:To find the values of theta where the maximum r-values occur on the graph of the polar equation r = 2 cos^4(theta), we need to find where the derivative of r with respect to theta is equal to zero, since the maximum r-values occur at these points.
First, we can simplify the equation by using the identity cos(2theta) = 2cos^2(theta) - 1 and substituting cos^2(theta) = (1 + cos(2theta))/2. This gives:
r = 2 cos^4(theta) = 2(1/2 + 1/2 cos(2theta))^2 = 1 + cos(2theta) + cos^2(2theta)/2.
Next, we can take the derivative of r with respect to theta, using the chain rule:
dr/dtheta = -sin(2theta) - 2cos(2theta)sin(2theta).
Setting this equal to zero and factoring out sin(2theta), we get:
sin(2theta)(-1 - 2cos(2theta)) = 0.
This equation is satisfied when sin(2theta) = 0 or cos(2theta) = -1/2.
When sin(2theta) = 0, we have 2theta = k*pi for some integer k. Therefore, theta = k*pi/2.
When cos(2theta) = -1/2, we have 2theta = 2*pi/3 + 2*k*pi or 2theta = 4*pi/3 + 2*k*pi for some integer k. Therefore, theta = pi/3 + k*pi or theta = 2*pi/3 + k*pi.
These are the values of theta where the maximum r-values occur on the graph of the polar equation r = 2 cos^4(theta).
A large container for water weighs 21 pounds. If a gallon of water weighs 8.34 pounds, what is an equation that relates the weight of the water and the container, W, in pounds and the amount of water, A, in gallons?
Answer: W= 8.34A
Step-by-step explanation:
Given: Weight of a gallon of water = 8.34 pounds
Then, weight of the water in container = (Weight of a gallon of water ) x (amount of water)
If A = amount of water (in gallons)
W = weight of the water in container ( in pounds)
i.e. \(W= 8.34A\)
Hence, the required equation : W= 8.34A
In order for the data in the table to represent a linear function with a rate of change of –8, what must be the value of a?
a = 2
a = 3
a = 19
a = 35
Answer:
I think it's 19
Step-by-step explanation:
27-8=19
In order for the data in the table to represent a linear function with a rate of change of –8, the value of 8 will be:
19What is a linear function?A linear function is one which when plotted produces a line. In the table provided although not indicated, there is an increase in the order of 10, 11, and 12 on the x axis while the y axis progresses in the order of 27, m, and 11.
So if the rate of change is -8, then 27 - 8 will give us 19.
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Triangle PQR is rotated 180 clockwise about point m and the image of point p is p and the image of point r is r what are the coordinates of the image of point Q
Answer:
Rotating 180 clockwise would mean that Q is Q if r is r, the coordinates of it pointing to Q would be in your picture , can I see a picture of the problem?
Step-by-step explanation:
Aurora is planning to participate in an event at her school's field day that requires her to complete tasks at various stations in the fastest time possible. To prepare for the event, she is practicing and keeping track of her time to complete each station.
The x-coordinate is the station number, and the y-coordinate is the time in minutes since the start of the race that she completed the task.
(1, 2), (2, 4), (3, 8), (4, 16)
Part A: Is this data modeling a linear function or an exponential function? Explain your answer.
Part B: Write a function to represent the data. Show your work.
Part C: Determine the average rate of change between station 2 and station 4. Show your work.
Answer:
She will need a time of 1024 units to complete the 10th station.
Step-by-step explanation:
A. As the quotient between consecutive terms is the same, the data is a geometric sequence.
B. The recursive formula is:
C. She will need a time of 1024 units to complete the 10th station.
In a sequence, if the difference between consecutive terms is the same, the sequence is arithmetic.
If the quotient between consecutive terms is the same, the sequence is geometric.
Item a:
When x increases by 1, y is multiplied by 2, hence, as the quotient between consecutive terms is the same, the data is a geometric sequence.
-8x+y=6
-8x+3y=-14
How would you solve this using the elimination method? Thanks!
Answer:
x = -1,375
y = -5
Step-by-step explanation:
{-8x + y = 6, / : (-1)
{-8x + 3y = -14;
Multiply the first equation by -1, so that we could eliminate 8x:
+ {8x - y = -6,
{-8x + 3y = -14;
----------------------
4y = - 20 / : 4
y = -5
Now, make x the subject from the first equation (you can do it from the 2nd one instead):
8x = -6 + y / : 8
x = -0,75 + 0,125y
x = -0,75 + 0,125 × (-5) = -0,75 - 0,625 = -1,375
the value of y is directly proportional to the value of x. if y =35 when x=140, what is the value y when x=70
Answer:
17.5
Step-by-step explanation:
35÷y = 140 ÷ 70
or, 35 = 2y
or, y= 17.5
The sum of two numbers is 210 and their difference is 30. What are the two numbers?
Answer:
120 and 90
Step-by-step explanation:
let one number be x and the other y
x + y = 210 (sum = 210)
x - y = 30 (difference = 30)
add the two equations together
2x = 240
divide both sides by 2 to isolate x
x = 120
plug into 1st equation
120 + y = 210
subtract 120 from both sides
y = 90
We take the 2 numbers as 'x' and 'x-30' in order to find those numbers
We plug the values into the given equation
\(x + x - 30 = 210\\2x - 30 = 210\\\\2x = 240\\x = \frac{240}{2} \\x = 120\\x - 30 = 120 - 30 = 90\\\)
\(120 - 90 = 30\)
Hence , the two numbers are 120 and 90
TRUE OR FALSE
There are whole numbers that are not integers.
There are rational numbers that are not whole
numbers.
All rational numbers are integers.
All whole numbers are rational numbers.
ANSWERS:
\(1. False \\ 2. True \\ 3. False \\ 4. True \\ \)
Hope you could get an idea from here.
Doubt clarification - use comment section.
Help please
Help please
Answer:
1. 1,605
2. -605
3. 21,575
Step-by-step explanation:
Answer:
1.1,605
2.-605
3.21,575
) (-4/8) ÷ 2/7 =
Help
Answer:
−
4
7
Step-by-step explanation:
Pasos de la solución
(−4/8)÷2/7
Reduzca la fracción
8
4
a su mínima expresión extrayendo y anulando 4.
7
2
−
2
1
Divide −
2
1
por
7
2
al multiplicar −
2
1
por el recíproco de
7
2
.
−
2
1
×(
2
7
)
Multiplica −
2
1
por
2
7
(para hacerlo, multiplica el numerador por el numerador y el denominador por el denominador).
2×2
−7
Realiza las multiplicaciones en la fracción
2×2
−7
.
4
−7
La fracción
4
−7
se puede reescribir como −
4
7
extrayendo el signo negativo.
−
4
7
Answer:
\(\frac{7}{4}\) or \(3 \frac{3}{4}\)
Step-by-step explanation:
It looks like this is your problem:
\(-\frac{4}{8} / \frac{2}{7}\)
"Keep, change, flip"
\(-\frac{4}{8} * \frac{7}{2}\)
Multiply across & simplify:
\(-\frac{28}{16} = \frac{14}{8}=\frac{7}{4}\) or \(3 \frac{3}{4}\)
Seven year back the age of a father was 5 times the age of
his son. It will be twice after 14 years. Find their ages at
present.
Step-by-step explanation:
x = age of father
y = age of son
x - 7 = 5(y - 7) = 5y - 35
x = 5y - 28
x + 14 = 2(y + 14) = 2y + 28
we use the identity of the first equation in the second equation :
5y - 28 + 14 = 2y + 28
3y = 28 + 28 - 14 = 42
y = 14
x = 5y - 28 = 5×14 - 28 = 70 - 28 = 42
the father is currently 42 years old.
the son is currently 14 years old.
Use the graph to answer the questions.
1) write into vertex form.
2) identify the vertex, focus, and directrix.
Answer:
y = 2( x+5)^2 -4
Vertex (-5,-4)
directrix y = -33/8
focus (-5, -31/8)
Step-by-step explanation:
First identify the vertex, which is the minimum
Vertex = (-5,-4)
The vertex form is y = a( x-h)^2 + k
y = a( x- -5)^2 -4
y = a( x+5)^2 -4
We need to determine a
Substitute a point on the graph
(-3,4) is on the graph
4 = a( -3+5)^2 -4
4 = a( 2)^2 -4
4 = 4a -4
Add 4 to each side
8 = 4a
Divide by 4
8/4 = a
a=2
y = 2( x+5)^2 -4
To find the focus and directrix, write in standard form
4p(y-k)=(x-h)^2
y+4 = 2(x+5)^2
1/2 (y+4) = (x+5)^2
4p = 1/2
p = 1/8
The focal length is 1/8
Subtract this from the y coordinate to get the directrix
y = -4 -1/8
y = -32/8 - 1/8 = -33/8
Add this to the y coordinate to get the coordinate for the focus the x coordinate the same
(-5, -4+1/8)
(-5, -32/4+1/8)
(-5, -31/8)
Question 2
No calculations are necessary to answer this question.
3/01
3/02
$1.7420 $1.7360
Date
July GBP Futures
Contract Price
O long; long
Based on the closing prices of July GBP Futures Contract over the 3-day period in March 20XX as shown above, you shou
position on 3/01 and a position on 3/02.
O long; short
O short; short
3/03
short; long
$1.7390
The given information does not provide any clear indication for determining the position that should be taken on 3/01 and 3/02. Without additional information, it is not possible to make a decision. The table only displays the closing prices of the July GBP Futures Contract on different days, and it is unclear what trading strategy or what scenario is being considered. Additional information about the goals and objectives, the market conditions, and other relevant factors would be necessary to make a decision about trading positions.
which of the following equations,written as the quadratic formula,is equivalent to the given equation?
Write an expression to represent the product of 6 and the square of a number plus 15. In your expression what is the value of the coefficient? A. 1 B. 6 C. 15 D. 2
Answer:
B) 6
Step-by-step explanation:
Let the number be x
Product of 6 and square of number plue 15 : (6x²) + 15
Coefficient of x² = 6
If m<1=55, find m<8.
Which expression is equivalent to 36 + 18
O 3(12 + 6).
O 3(33 + 6)
Submi
O 6(6 + 18)
O 6(6+2)