Find the missing number that makes the fractions equivalent.- 
= - 
A. 5
B. 50
C. 25
D. 75
Answer: B
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The population N, in thousands, of a small town after t years is given in the table below. Use exponential regression to find the yearly percentage decay rate of the population. Round your answer to two decimal places. t 2 4 6 8 10 N 8.70 6.91 5.07 3.92 3.32?
A. 12.00% B. 11.77% C. 13.77% D. 14.88%
Write an equation that expresses the relationship. Use k as the constant of variation.p varies jointly as the square of q and the square of r.
A. p + q2 + r2 = k B. pq2r2 = k C. p = k + q2 + r2 D. p = kq2r2
Newton's Law of Gravitation states that two bodies with masses 
attract each other with a force 
where r is the distance between the bodies and G is the gravitation constant. If one of bodies is fixed, find the work needed to move the other from r = l to r = g.
Find the exact value of the integral using a formula from geometry.
for the indicated region.
A. 42 B. 7 C. 49 D. 14