In a study of heart surgery, one issue was the effect of drugs called beta blockers on the pulse rate of patients during surgery. The available subjects were randomly assigned into two groups. One group received a beta blocker; the other group received a placebo. The pulse rate of each patient at a critical point during the operation was recorded. Here are the data in summary form:

Hi nice to meet u ! U seem like such a sweet cool person-----------------------------------------------------------i need friends too :)

Answer:

hi same im from the us and my fist language is Spanish also i hate math but like history and i like anime favorite anime is AOT favorite manga is berserk and favorite game to play is terraria

Step-by-step explanation:

The answer is  True, the percentile rank identifies the percentile of a particular value within a set of data.

The percentile rank is a measure that identifies the percentage of scores in a distribution that are equal to or lower than a given score. It is calculated by dividing the number of scores that are equal to or lower than the given score by the total number of scores in the distribution, and multiplying the result by 100 to obtain a percentage. The percentile rank can be used to compare individual scores to the rest of the distribution, and can provide useful information about the relative standing of a score within a particular group or population. Therefore, it is true that the percentile rank identifies the percentile of a particular value within a set of data.

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Answer:

hope this helps :)

Step-by-step explanation:

a) yes, this is a polygon (shape with 4 sides)

b) the polygon is a concave

c) equilateral

d) this type of polygon is called 'arrowhead'

To sketch the region enclosed by the given curves y = x and y = 1/4x, with the restriction 0 ≤ x ≤ 25, we can start by plotting the two curves on a coordinate plane and shading the region between them.

The curve y = x is a straight line passing through the origin (0, 0) and has a slope of 1. The curve y = 1/4x is also a straight line passing through the origin, but with a slope of 1/4.

First, let's plot the line y = x:

When x = 0, y = 0

When x = 25, y = 25

Plotting these two points and drawing a line passing through them will give us the line y = x.

Next, let's plot the line y = 1/4x:

When x = 0, y = 0

When x = 25, y = 25/4 = 6.25

Plotting these two points and drawing a line passing through them will give us the line y = 1/4x.

Now, we need to shade the region between these two curves. Since the restriction is 0 ≤ x ≤ 25, we only need to consider the region between x = 0 and x = 25.

The region will be bounded by the curves y = x and y = 1/4x.

Here is a rough sketch of the region enclosed by the given curves:

       |\

       | \

       |  \        y = 1/4x

       |   \

       |    \

________|____\______ y = x

       |     \

       |      \

       |       \

       |        \

       |         \

The shaded region is the area enclosed by the curves y = x and y = 1/4x, with x ranging from 0 to 25.

Note: The sketch may not be perfectly to scale, but it should give you an idea of the shape and boundaries of the region.

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Answer:

  8

Step-by-step explanation:

Let x represent the number. Then the reciprocal is 1/x. The quotient of 25 and the number is 25/x. The problem statement tells us ...

  3 + 1/x = 25/x

Subtracting 1/x, we have ...

  3 = 24/x

  x = 24/3 = 8 . . . . . . . . multiply by x/3

The number is 8.

Answer:

2

Step-by-step explanation:

Answer:

the listeners. There were 49 listeners who rated

Step-by-step explanation:

Answer:

A

Step-by-step explanation:

f(x) = x²

f(x) becomes f(13x) + 6

the "+ 6" at the end tells us already everything, because there is only one aber option listed that contains a shift up. and that is exactly what that "+ 6" did. it adds 6 to every possible y value of the function. so, the whole function moves up by 6 units.

and yes, the 13x of f(13x) stretches the function horizontally (along the x axis).

simply said, whenever the x value for the original function increased by 1, it increases for the new function by 13.

Answer:

135

Step-by-step explanation:

75 x - 30 = 45

Inequality

45 x 3 =

135 (Inequality)

The answer is 1.72.

Division is splitting into equal parts or groups.

Given that 18.92 divided by 11

Let’s have a simple division.

18.92 : 11 = 1.72

Hence, 18.92 divided by 11 equal to 1.72

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The completed relationship is:

0.001 grams = 0.0000000551 µg

To complete the relationship, we need to convert the units of the left-hand side and simplify the right-hand side.

Starting with the left-hand side:

1 mg = 1 milligram = 0.001 grams

Now, we can substitute this into the relationship:

For the right-hand side:

1100 in binary is equal to\(12^3 + 12^2 + 02^1 + 02^0 = 8 + 4 = 12\)

10001000 in binary is equal to \(12^7 + 02^6 + 02^5 + 02^4 + 12^3 + 02^2 + 02^1 + 02^0 = 128 + 8 = 136\)

100 in binary is equal to \(12^2 + 02^1 + 0*2^0 = 4\)

Now, we can substitute these values into the relationship:

0.001 grams = 12 µg / 136 / 4

Simplifying the right-hand side:

12 µg / 136 / 4 = 12 * (1/1000000) * (1/136) * (1/4) = 0.00000005514706...

Rounding this to a reasonable number of significant digits, we get:

0.0000000551

Therefore, the completed relationship is:

0.001 grams = 0.0000000551 µg

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Answer:

c

Step-by-step explanation:

Function that calculates the base 10 log of the list num_val.

C Code:

#include <stdio.h>

int log_10(int a)

{

   return (a > 9)

           ? 1 + log_10(a / 10)

           : 0;

}

int main()

{

   int i;

   int num_val[10] = {15, 29, 76, 18, 23, 7, 39, 32, 40, 44};

   for(i=0; i<10; i++)

   {

       if(num_val[i]%2!=0)

       {

           printf("%d ", log_10(num_val[i]));

       }

   }

   return 0;

}

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If a line parallel to one side of a triangle contacts the other two sides of the triangle, the line proportionally splits these two sides. If DE = BC, then ADDB=AEEC.

If a line parallel to one side of a triangle contacts the other two sides, the two sides are proportionately divided.

The formula for a proportional equation is y = kx. The letters y and x denote the variables in the equation. The letter k represents the proportionality constant, which is fixed.

Because matching angles produce the AA similarity shortcut, when a line is drawn parallel to one side of a triangle, two similar triangles are generated. Because the triangles are comparable, the parallel line segments are proportionate segments.

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answer: y= 1/4 is the answer

Answer: C

Step-by-step explanation: (x+2) 2+(y-1) 2=3

The vectors u and v are not equal because they have different direction.

If the initial point is (x₁, y₁)  and terminal point is (x₂, y₂) then the vector is

Vector =(x₂-x₁)i+(y₂-y₁)j

Vector v with an initial point of (0, 0) and a terminal point of (50,120).

Vector v = 50i+120j..(1)

Vector u with an initial point of (50, 120) and a terminal point of (0,0).

Vector u = (0-50)i+(0-120)j

=-50i-120j..(2)

Hence, the vectors u and v are not equal because they have different direction.

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Question: In a sale, the price of a book is reduced by 25%. The price of the book in the sale is £12. Work out the original price of the book

Answer: £16

Step-by-step explanation:

To determine the original price of the book, we can use the fact that the sale price is 75% (100% - 25%) of the original price. Let's denote the original price as x.

75% of x = £12

To solve for x, we can set up the equation:

0.75x = £12

To isolate x, we divide both sides of the equation by 0.75:

x = £12 / 0.75

x = £16

Therefore, the original price of the book was £16.

Answer:

a) \(p \geq 60\,ft^{2}\), b) \(w \geq 36\,ft\), c) \(1\,qt \leq q \leq 2\,qt\), d) \(0.70\cdot p + 0.10\cdot w + 8\cdot q \leq 65\)

Step-by-step explanation:

In this question we proceed to translate each sentence into mathematical language and, more specifically, inequations:

a) At least 60 square feet of plywood for the surface

Let \(p\) the surface area of plywood, measured in square feet, and the inequation is:

\(p \geq 60\,ft^{2}\) (Eq. 1)

b) At least 36 feet of wood planks for the frame of the dog house

Let \(w\) the total length of wood planks, measured in feet, and the inequation is:

\(w \geq 36\,ft\) (Eq. 2)

c) Between 1 and 2 quarts of paint

Let \(q\) the total capacity of paint, measured in quarts, and the inequation is:

\(1\,qt \leq q \leq 2\,qt\) (Eq. 3)

d) Han's budget is $ 65. Plywood costs $ 0.70 per square foot, planks of wood cost $ 0.10 per foot and paint costs $ 8 per quart.

Dimensionally speaking, we understand that cost equals unit cost multiplied by physical variable (i.e. Area, length or capacity). Let \(p\), \(w\) and \(q\) the surface area of plywood, the total length of wood planks and the total capacity of paint, respectively. The sentence is represented by the following inequation:

\(0.70\cdot p + 0.10\cdot w + 8\cdot q \leq 65\) (Eq. 4)

Write an inequality to represent each constraint(material and cost)

Plywood:

plywood ≥ 60 square feet

Planks:

planks ≥ 36 feet

Paints

1 quarts ≤ paints ≤ 2 quarts

Inequality to represent cost constraint

Plywood = $0.70

planks of wood = $0.10

paint costs $8

Total cost = $65

0.70 × p + 0.10 × pw + 8 × Pa ≤ 65

0.70p + 0.10pw + 8pa ≤ 65

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Answer:

(a): 10 civil servants who were absent.

(b): 15 civil servants are in field only.

Step-by-step explanation:

Let;

\({ \rm{ \sum(n) = 90}} \\ \\ { \rm{n(o) = 65}} \\ \\ { \rm{n(f) = 50}} \\ \\ { \rm{(o \: { \huge{n}} \: f) = 35}}\)

Question (a):

Let the absentees be x

\({ \rm{x + (65 - 35) + (50 - 35) + 35 = 90}} \\ \\ { \rm{x + 80 = 90}} \\ \\ { \rm{x = 10}}\)

There are 10 absentees.

Question (b):

Servants in field only;

\({ \rm{n(f \: only) = 50 - 35}} \\ \\ { \rm{n(f \: only) = 15 \: servants}}\)

To find the 70th percentile we look for the z value that gives the following probability:

Looking at the standard normal distribution table we notice that this probability happens when:

Then we need the z score to be 0.5244 .Now that we know this we use its definition to find the value of x that gives this z score:

Therefore, the 70th percentile is 287.45

Answer:

60 cm

Step-by-step explanation:

The perimeter of a polygon means adding up all the side lengths.

In this case, we need to add up 13, 12, 8, 8, and 19

Adding all of these gets us 60

Answer:

when x = -3; y = -22/7

when x = 0;  y = -13/7

when x = 3;  y = -4/7

y = 3/7x - 13/7

x = 7/3y + 13/3

Step-by-step explanation:

x = -3;    3(-3) - 7y = 13; -9 - 7y = 13; -7y = 22; y = -22/7

x = 0;     3(0) -7y = 13; -7y = 13; y = -13/7

x = 3;     3(3) -7y = 13; 9 - 7y = 13; -7y = 4; y = -4/7

SOLVE FOR Y: 3x - 7y = 13; -7y = -3x + 13; y = 3/7x - 13/7

SOLVE FOR X: 3x - 7y = 13; 3x = 7y + 13; x = 7/3y + 13/3

Answer:

$17

Step-by-step explanation:

initial cost + hourly rate (number of hours)

$5 + $3 x 4

$5 + $12

= $17

Answer:

Step-by-step explanation:

i did it

Answer:

C B E

Step-by-step explanation:

Answer:

y=-3/10x+1/2

use the coordinates to find the gradient (m)then substitute it in this formula y=mx+c

find c by substituting one of the coordinate

Answer:

b

because the mean refers to the most recurring numeral and in b it is two recurring about 5 times

The density of the gold sample is 19.3g/cm³

Let the mass of the gold sample be represented by m

m = 579 g

Let the volume of the gold sample be represented by V

V = 30 cm³

Let the density of the gold sample be represented by ρ

The formula for the density is:

\(Density = \frac{Mass}{Volume}\)

\(\rho = \frac{m}{V} \\\rho = \frac{579}{30} \\\rho = 19.3 g/cm^3\)

The density of the gold sample is 19.3g/cm³

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The length of the bridge in yards is 6971.36 yards

From the question, we have the following parameters that can be used in our computation:

lake has a length of 3.961 mi.

This means that

Lenght = 3.961 mi.

Use the table of facts to find the length of the bridge in yards, we have

1 mile = 1760 yards

Substitute the known values in the above equation, so, we have the following representation

3.961 * 1 mile = 3.961 * 1760 yards

Evaluate the products

3.961 miles = 6971.36 yards

Recall that

Lenght = 3.961 mi.

So, we have

Lenght = 6971.36 yards

Hence, the length is 6971.36 yards

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