Master Mathematics with Fun Quizzes & Brain Teasers!

423 x 764 to one significant number
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draw a number line from -5 to +5
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Solve the logarithmic equation by writing in exponential form or by graphing. Round to the nearest thousandth if necessary. log (x 2) = 1
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Swathu buys a new scooter on loan. The loan is for Rs. 90,000 atrase of interest 8% per annum compounded half yearly for 2 years
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SOMEONE HELP AND ANSWER THIS FOR BRAINLIST IF CORRECTThe line plot displays the cost of used books in dollars.A horizontal line starting at 1 with tick marks every one unit up to 9. The line is labeled Cost in Dollars, and the graph is titled Cost of Used Books. There is one dot above 2, 4, 8, and 9.There are two dots above 6 and 7. There are three dots above 3.Which measure of center is most appropriate to represent the data in the graph, and why? The mean is the best measure of center because there are no outliers present. The mean is the best measure of center because there are outliers present. The median is the best measure of center because there are no outliers present. The median is the best measure of center because there are outliers present.
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Answer for bonus points!
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1. The sum of the external angles at the four vertices of a convex 9-gon is 120 and their ratio is 2:3:3:4. If the ratio of the remaining five exterior angles is 4:6.5:5.5:2.2:5.8, find the interior angles of the convex octagon.2. The sum of external angles at five non-neighboring vertices of a convex decagon is 160, the maximum of which is 45, the minimum is 15, and the ratio of the remaining three angles is 3:4:3. The interior angle ratio in the remaining five vertices was 5:2:3:8:7. Find the interior angles of a convex decagon3. When the longest diagonal of a convex hexagon is drawn, two equal quadrilaterals are formed. If the exterior angles of a quadrilateral are in the ratio 1:2:4:5, find the exterior angles of a convex hexagon.
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Answer for bonus points!!
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Diameter measurements of 200 roller bearings made by a lathe for one week showed a mean of 1.824 inches and a sample standard deviation of 0.064 inches. What is the 95% confidence interval of the mean diameter of all roller bearings
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Suppose that a department contains 11 men and 15 women. How many ways are there to form a committee with six members if it must have more women than men
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A south-east facing (45 degrees from south and east) window of a building located in Pittsburg, PA. Calculate the solar incident angle for the window at 10:00AM on January 20th.
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The daily dinner bills in a local restaurant are normally distributed with a mean of $28 and a standard deviation of $6. a. Define the random variable in words. b. What is the probability that a randomly selected bill will be at least $39.10
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You will write a program that lets a teacher convert exam grades for his/her class from scores to letter-grades, then calculate how many grades are in each letter-grade category, and finally visualize the letter-grade distribution in the form of a histogram.
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The standard deviation of a standard normal distribution a. can be any positive value b. is always equal to one c. can be any value d. is always equal to zero
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How many 4-digit campus telephone numbers (4-digit decimal sequences) are there in which the digit 6 appears at most twice (maybe not at all)
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In how many ways can you fit 1 X 1 X 2 sized dominoes into a domino of dimensions 2 X 2 X N, where N is a variable
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At a certain university, the National Science Foundation awarded a large grant to create environmental science laboratory courses. The purpose of these courses was to educate students about the impacts of certain activities on the environment. In assessing the impact of the courses on students' attitudes, a special survey was administered during the first few semesters that the courses were taught. The data from these surveys were analyzed using multiple hypothesis tests. In all, 51 tests were performed to attempt to connect student demographics with increased environmental awareness. Three of the test results were significant at the 5% level. We should exercise caution in looking at these results because __________.
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According to a popular model of temperament forwarded by Buss and Plomin, how many general temperaments are there
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Suppose a homogeneous system of equations has 13 variables and 8 equations. How many solutions will it have
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Which equation is the inverse of 5y+4= (x+3)+12?O y = x+x+1100y=3 5x+ 7/2O-5-4--(x+3)--1/OO y=-3 5x+7
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The lengths of pregnancies in a small rural village are normally distributed with a mean of 270 days and a standard deviation of 14 days. In what range would you expect to find the middle 98% of most pregnancies
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