Simplify the expression. Express the answer so that all exponents are positive. Whenever an exponent is 0 or negative, we assume that the base is not 0.(x9y-1)9
A. x81y9
B. 
C. 
D. 
Answer: C
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Find an equation for the ellipse.Center at (0, 0); focus at (0, -6); vertex at (0, 7)
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Find the area of the specified region.Inside the limacon r = 9 + 6 sin ?
A. 99? B. 198? C. 198? - 108 D. 99? + 108
Find the modified quota asked for. Round your answer to two decimals.A school district receives a grant to purchase 55 new computers to be apportioned among the 6 schools in the district based on the student population of each school. The student populations are given in the following table. 
Find the modified quota for school B using the divisor 28.5.
A. 7.63 B. 7.52 C. 7.40 D. 7.55
Solve the system using Cramer's rule and a graphing calculator. (Round to two decimal places.)7.04x + 0.09y = 2-8.59x + 5.54y = 1
A. {(-0.61, 0.28)} B. {(-0.28, -0.61)} C. {(0.28, 0.61)} D. {(0.61, 0.28)}