Write the expression using exponents.
?
?
A. 
B. ?
C. ?
D. ?
Answer: C
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Use a grapher to find the vertex or x-intercepts, as indicated, of the quadratic function.Find the vertex of the function f(x) = 0.4x2 + 2.8x + 5.8.
A. (3.5, 0.9) B. (-3.5, 0.9) C. (-1.4, 3.84) D. (3.5, 3.84)
Factor completely. If the polynomial is prime, state so.t3 + 729
A. (t + 9)(t2 + 81) B. (t - 729)(t + 1)(t - 1) C. (t - 9)(t2 + 9t + 81) D. (t + 9)(t2 - 9t + 81)
Solve.Find the volume of a pyramid with a square base 3 inches on a side and a height of 
inches.
A. 3
cu in.
B. 5
cu in.
C. 16
cu in.
D. 1
cu in.
Solve.When making a telephone call using a calling card, a call lasting 4 minutes cost $1.20. A call lasting 13 minutes cost $3.00. Let y be the cost of making a call lasting x minutes using a calling card. Write a linear equation that relates the cost of a making a call, y, to the time x.
A. y = 0.2x - 10
B. y = 5x - 
C. y = -0.2x + 2
D. y = 0.2x + 0.4