Factor out the greatest common factor.5x2 + 30x
A. 5x(x + 6x)
B. 5x(x + 6)
C. 5(x2 + 6x)
D. x(5x + 30)
Answer: B
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Magazine circulation after t years is modeled by the function
.
?
When did magazine circulation reach 10.00 thousand? Round your answer to two decimal places.
?
A. After 6.17 years B. After 5.80 years C. After 4.20 years D. After 3.00 years
Evaluate the double integral over the given region.
R = {(x, y): 0 ? x ? 1, 0 ? y ? 3}
A. 
ln 2
B. ln 2 ln 4
C. ln 8
D. 4 ln 2
Solve.The monthly cost of a certain long distance service is given by the linear function 
where C(t) is in dollars and t is the amount of time in minutes called in a month. Find the cost of calling long distance for 80 minutes in a month.
A. $14.35 B. $15.95 C. $13.35 D. $6.40
Tell whether the angle is acute, right, obtuse, or straight.?ADB 
A. Right B. Obtuse C. Straight D. Acute