Solve the problem.The function r(x) = x2 - 30x - 60 describes a company's monthly revenue and 
describes the monthly costs where x represents the number of units produced and then sold. How many units must be sold for the company to break even (which means the net = 0)?
A. 80 units
B. 39 units
C. 40 units
D. 38 units
Answer: C
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Solve the problem. Use ? = 3.14 when necessary.A giant cube-shaped die measures 10 cm on a side. Find the volume of the die.
A. 100 cm3 B. 30 cm3 C. 600 cm3 D. 1000 cm3
Find a formula for the function graphed.
A. f(x) = 
B. f(x) = 
C. f(x) = 
D. f(x) = 
Malia buys a chocolate-strawberry-vanilla cake in Figure(i) for $14.00 . She cuts the cake into six 60° wedges as shown in Figure (ii). Malia likes chocolate twice as much as vanilla and likes vanilla twice as much as strawberry.
What is the value of piece 5 to Malia?
A. $1.00 B. $3.00 C. $4.00 D. $2.00 E. none of these
Solve.The relationship between 
and 
degrees of measuring temperature is linear. Find an equation relating 
and 
if 
corresponds to 
style="vertical-align: -4.0px;" /> and 
corresponds to 
Use the equation to find the Celsius measure of 
A. C = 
F - 
; 
°C
B. C = 
F - 10; 
°C
C. C = 
F - 80; - 
°C
D. C = 
F + 
; 
°C