Answer the question as instructed.Which of the following is the correct way to evaluate the expression 6 + 6 ? 4?
A. 6 + 6 ? 4 = 6 + 24 = 30
B. 6 + 6 ? 4 = 24 + 24 = 48
C. 6 + 6 ? 4 = 24 + 6 = 30
D. 6 + 6 ? 4 = 12 ? 4 = 48
Answer: A
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Solve the problem.From 9 names on a ballot, a committee of 3 will be elected to attend a political national convention. How many different committees are possible?
A. 60,480 B. 84 C. 504 D. 252
Solve.A calculator has a purchase price of $18. If the sales tax on this purchase is $1.53, find the sales tax rate.
A. 0.078% B. 0.915% C. 8.5% D. 0.085%
Simplify the expression.
A. 25
B. 13
C. 5
D. 5
During a fermentation experiment, the population P(t ) (in millions per mL) of bacteria Lactobacilli reuteri after t hours in a barley medium satisfied the differential equation dP/dt = 0.14p (1- P/20) Initially, 1.6 million bacteria per mL were present.
(a) Determine the number of bacteria per mL after 5 hr. (b) Determine when 10 million bacterial per mL will be present.