Solve the problem.The function f, given in the diagram below, computes the average cost of an item during year x. Evaluate f(2007).
A. 420
B. 570
C. 510
D. 460
Answer: D
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Solve the literal equation for the specified variable.d = rt for r
A. r = d - t
B. r = 
C. r = dt
D. r = 
If you have the following function f ( x ) = 5x + 6, compute f (5), f (-5), f (9), f (-9).
A. f (5) = 34, f (-5) = -21, f (9) = 54, f (-9) = -41 B. f (5) = 31, f (-5) = -19, f (9) = 51, f (-9) = -39 C. f (5) = 30, f (-5) = -18, f (9) = 50, f (-9) = -38 D. f (5) = 32, f (-5) = -20, f (9) = 52, f (-9) = -40 E. f (5) = -31, f (-5) = 19, f (9) = - 51, f (-9) = 39
A salesman earns a base salary plus a percentage of sales. The following table shows the income I, in dollars, of a salesman who has sales of d dollars. Round your answers to two decimal places, if necessary. ? d $2500 $3091 $3682 $4273 I $1515.36 $1562.64 $1609.92 $1657.2? A: Complete a table of changes to show that the data are linear.B: Find a linear model for the data.C: Explain in practical terms the meaning of the linear function in part B. Your answer should be stated in terms of base salary plus percentage of sales.
What will be an ideal response?
Solve the problem.Find the half-life of the radioactive element radium, assuming that its decay constant is 
with time measured in years.
A. 1600 years B. 2308 years C. 800 years D. 1400 years