Solve the problem.The rate at which an assembly line worker's efficiency E (expressed as a percent) changes with respect to time t is given by 
where t is the number of hours since the worker's shift began. Assuming that 
find E(t).
A. E(t) = 55t - 2t2 + 141
B. E(t) = 55t - 2t2 + 35
C. E(t) = 55t - 4t2 + 35
D. E(t) = 55t - 2t2 + 88
Answer: B
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Evaluate the expression.
A. 
B. 
C. 
D. 5
E. -5
Classify the number as one or more of the following: whole number, integer, rational number, irrational number, or real number.71
A. Whole number, integer, real number B. Whole number, integer C. Whole number, integer, rational number, real number D. Real number
Use the circle graph to answer the question.How did a family spend a total of 20,000 miles driving to different locations for various purposes over the course of one year? Simplify the fraction representing the number of Medical miles driven. 
A. 
B. 
C. 
D. 
The price of a certain commodity in dollars per unit at time t (measured in weeks) is given by
?
.
?
What is the price of the commodity at 
?
?
$__________/unit
?
How fast is the price of the commodity changing at 
?
?
__________ (increasing / decreasing) at the rate of $__________/wk
?
Find the equilibrium price of the commodity. (Hint: It's given by 
. Also, use the fact that 
.)
?
$__________/unit
What will be an ideal response?