Solve.A student scored 68, 90, and 93 on three algebra tests. What must he score on the fourth test in order to have an average grade of at least 85?
A. 63
B. 30
C. 84
D. 89
Answer: D
Mathematics
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Solve the problem.In a chemical reaction, the rate at which the amount of a reactant changes with time is proportional to the amount present, such that 
, when t is measured in hours. If there are 
of reactant present when t = 0, how many grams will be left after 
? Give your answer to the nearest tenth of a gram.
A. 5.9 g B. 4 g C. 2 g D. 0.1 g
Mathematics
Determine whether the improper integral converges or diverges.
A. Converges B. Diverges
Mathematics
Simplify.0 ÷ 9 + 7 × 2
A. Undefined B. 23 C. 32 D. 14
Mathematics
Multiply the expression as you would multiply polynomials.
?
?
A. 
B. ?
C. ?
D. ?
Mathematics