Solve the problem.On a biology test, a student answered 25 questions correctly but did not pass. On a second attempt, the student answered 31 questions correctly. What was the percent increase in the number of questions answered correctly?
A. 6%
B. 19.4%
C. 24%
D. 76%
Answer: C
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Solve.The perimeter of a rectangle is 62 feet. Describe the possible length of a side if the area of the rectangle is not to exceed 198 square feet.
A. The length of the shortest side cannot exceed 22 feet. B. The length of the shortest side must be at least 9 feet. C. The length of the shortest side cannot exceed 9 feet. D. The length of the shortest side must be at least 22 feet.
Solve the problem.A certain radioactive isotope has a half-life of approximately 1800 years. How many years would be required for a given amount of this isotope to decay to 60% of that amount?
A. 1327 yr B. 2379 yr C. 720 yr D. 1267 yr
Find the difference and simplify the answer. 
- 
A. 
B. 
C. 
D. 
Solve the equation for the indicated variable.V = 
for B
A. B = 
B. B = 
C. B = 
D. B = 