Factor.10xy3 - 9xy2 - 9xy
A. y(2xy - 3)(5y + 3x)
B. xy(2y + 3)(5y - 3)
C. y(10xy - 3)(y + 3x)
D. xy(2y - 3)(5y + 3)
Answer: D
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The equation gives the position s = f(t) of a body moving on a coordinate line (s in meters, t in seconds).s = -6 + 7 cos tFind the body's acceleration at time t = ?/3 sec.
A. - 
m/sec2
B. - 
m/sec2
C. 
m/sec2
D. 
m/sec2
Write as a percent.
A. 87.5% B. 109.4% C. 8.75% D. 80%
Solve the problem.The half-life of an element is 4.2 × 1011 yr. How long does it take a sample of the element to decay to 
of its original mass? Use 
where A0 is the initial amount, T is the half-life, and t is the time. (Express results in scientific notation, rounded to the nearest hundredth.)
A. 1.49 × 1011 yr B. 7.66 × 1010 yr C. 3.22 × 1011 yr D. 3.10 × 1011 yr
Evaluate the function at the given value.f(t) = 
+ 2; f(11)
A. 24 B. 10 C. 14 D. 12