Solve the problem. Where appropriate, round to the nearest tenth of a percent.On a biology test, a student got 25 questions correct but did not pass. On a second attempt, the student got 31 questions correct. What was the percent increase?
A. 76%
B. 6%
C. 24%
D. 19.4%
Answer: C
Mathematics
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Find the series' radius of convergence.
A. 1 B. ?, for all x C. 2 D. 0
Mathematics
Find the slope of the line through the points.(2, 4) and (7, 4)
A. Undefined
B. 
C. 
D. 0
Mathematics
Solve the problem. Express the answer in scientific notation to two decimals.A computer can do one calculation in 1.4 × 10-7 seconds. How long would it take the computer to do a trillion (1012) calculations?
A. 1.4 × 1012 sec B. 1.4 × 106 sec C. 1.4 × 105 sec D. 1.4 × 10-7 sec
Mathematics
Find all angles in [0°, 360°) that satisfy the equation.cos 3? = 0
A. 
B. 
C. 
D. 
Mathematics