Use the rules for exponents to rewrite the expression and then evaluate the new expression. 42 ? 45
A. 262,144
B. 16,777,216
C. 16,384
D. 1,048,576
Answer: C
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Find the derivative of y with respect to x.y = 2 sin-1 (4x3)
A. 
B. 
C. 
D. 
Find the unknown number in the proportion. Write your answer as a whole number or a mixed number if possible.
= 
A. x = 1
B. x = 2
C. x = 
D. x = 
Solve the problem.The following graph shows that more and more people in a certain country are moving from urban areas to the suburbs. In 2000, the percentage of the population living in urban areas was 71 and this percentage decreased by 2.4 each year, on average, in the period 2000-2010. In 2000, the percentage of the population living in the suburbs was 4 and this percentage increased by 2.4 each year, on average, in the period 2000-2010. Assuming this trend continues, estimate the year in which the percentage of the population living in urban areas will be equal to the percentage living in the suburbs. 
A. 2015 B. 2014 C. 2019 D. 2011
Find the circumference of the circle. Use 3.14 or 
for ? as indicated.Use 3.14 for ?.
A. 257.48 ft B. 128.74 ft C. 64.37 ft D. 1,319.59 ft