Solve the problem.Scores on a test are approximately normally distributed with a mean of 70 and a standard deviation of 9. The teacher wants to give A's to the top 10% of students, B's to the next 25%, and C's to the next 42%. What is the bottom cutoff for a C grade? Round your answer to the nearest whole number.
A. 65
B. 68
C. 77
D. 63
Answer: D
Mathematics
You might also like to view...
Solve the problem.A cylinder is to be made so that its volume is equal to that of a sphere with a radius of 3 inches. If a cylinder is to have a height of 9 inches, find its radius.
A. 
in.
B. 2
in.
C. 1.5 in.
D. 2 in.
Mathematics
Solve the inequality and graph the solution set.|x + 16| > 7
A. 
B. 
C. 
D. 
Mathematics
Add and simplify. Write the answer as a mixed number as needed.
- 
A. 
B. 
C. 
D. 
Mathematics
Evaluate the variable expression for x = –17.17, y = 34, and z = –3.9264.
A) 55.0964 B) 20.7564 C) 12.9036 D) –12.9036 E) –55.0964
Mathematics