The scores of students on a standardized test form a normal distribution with a mean of 300 and a standard deviation of 40. What fraction of the students scored between 272 and 328?
What will be an ideal response?
0.5160
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Does the problem involve permutations or combinations? Do not solve.In a student government election, 5 seniors, 2 juniors, and 
sophomores are running for election. Students elect four at-large senators. In how many ways can this be done?
A. permutations B. combinations
Match the graph to one of the polar equations.
A. r = 6 sin ? B. r = 3 + cos ? C. r = 6 cos ? D. r = 3 + sin ?
Add.+ 
A. 509.08 B. 509.19 C. 509.09 D. 509.18
Use front-end rounding to round each number. Then, add or subtract the rounded numbers to get an estimated answer. Finally, find the exact answer.What is 6.045 grams from 622.2 grams?
A. Estimate: 594 grams; exact: 616.165 grams B. Estimate: 694 grams; exact: 626.155 grams C. Estimate: 594 grams; exact: 616.255 grams D. Estimate: 594 grams; exact: 616.155 grams