Evaluate the expression for the given value or values.
, for y = -21, z = 7
A. -7
B. -3
C. 3
D. 7
Answer: B
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Solve the problem.Suppose that 
= 1. Find 
and 
.
A. 3; 1 B. 1; -1 C. 0; -1 D. 0; 1
Use rational exponents to simplify the expression, if possible. Then, write the answer in radical form.
? 
A. v
B. v4
C. v2
D. 
Find the domain of the function.Suppose the function D(p) = 1000 - 10p represents the demand for hot dogs, whose price is p, at a baseball game. Find the domain of the function.
A. [0, 1000] B. [0, ?) C. [0, 100] D. [0, 10]
Provide an appropriate response.The formula for simple interest is I = PRT, where I is the amount of interest, P is the principal amount borrowed, R is the percent of interest charges, and T is the length of time of the loan. If the interest is $306, the principal is $2,550, and the rate is 8%, write an equation and solve to find the length of time of the loan.
Fill in the blank(s) with the appropriate word(s).