Factor the difference of two squares.x2 - 4
A. (x + 2)(x - 2)
B. (x2 + 2)(x2 - 2)
C. (x - 2)(x - 2)
D. (x + 4)(x - 4)
Answer: A
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Factor the four-term polynomial by grouping.x3 + 7x + x2 + 7
A. (7x + 1)(x + 1) B. (x2 + 7)(x + 1) C. (x2 + 1)(7x + 1) D. (x2 + 1)(x + 7)
The average number N of prey that certain predators will consume depends on the density D, in number per square foot, of the prey. The relationship is
.
?
What is the largest average number of prey that predators will consume no matter what the density of the prey is? Round your answer to two decimal places, if necessary.
?
A. 2 B. 6 C. 3.00 D. None of the above
Solve the problem.An investor buys a $20,000 T-bill at a 7% discount for 26 weeks. Find the effective interest rate. (Assume 52 weeks per year.)
A. 7.25% B. 5.45% C. 10.50% D. 3.63%
Solve the problem.A coin is tossed upward from a balcony 
high with an initial velocity of 
During what interval of time will the coin be at a height of at least 
(h = -16t2 + vot + ho.)
A. 4 ? t ? 5 B. 0 ? t ? 1 C. 0 ? t ? 5 D. 5 ? t ? 10