Solve.The public swimming pool, which is a rectangle measuring 
by 
needs a new deck. The deck of uniform width that will surround the pool will be made of concrete. There is only enough money in the budget to cover 
with concrete. How wide should the path be?
A. 11 m
B. 9 m
C. 5 m
D. 7 m
Answer: D
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Solve the problem.Write an expression in simplest form that represents the perimeter of the shape. Then use the expression to find the perimeter of the shape if y is 11.
A. y5 + 12; 161,063 B. 5y + 12; 67 C. 5y + 7; 62 D. 3y + 7; 40
Solve the formula for the specified variable.d = rt for r
A. r = dt
B. r = 
C. r = 
D. r = d - t
Factor.20z4 + 3z2 - 9
A. (5z2 + 3)(4z2 - 3) B. (5z4 + 3)(4z - 3) C. (4z2 + 3)(5z2 - 3) D. (4z4 + 3)(5z - 3)
Solve the problem.A product sells by word of mouth. The company that produces the product has noticed that revenue from sales is given by 
where x is the number of units produced and sold. If the revenue keeps changing at a rate of 
per month, how fast is the rate of sales changing when 800 units have been made and sold? (Round to the nearest dollar per month.)
A. $25,456/month B. $101,823/month C. $32/month D. $12,728/month