Solve the problem.To remodel a bathroom, a contractor charges $25 per hour plus material costs, which amount to $3500. Therefore, the total cost to remodel the bathroom is given by 
where x is the number of hours the contractor works. Find a formula for 
What does 
compute?
A. f -1(x) = 
- 3500; This computes the total cost if the contractor works x hours.
B. f -1(x) = 
- 140; This computes the total cost if the contractor works x hours.
C. f -1(x) = 
- 3500; This computes the number of hours worked if the total cost is x dollars.
D. f -1(x) = 
- 140; This computes the number of hours worked if the total cost is x dollars.
Answer: D
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Solve the problem.Find the current I as a function of time in an RCL circuit if R = 103 ?, L = 0, 
and 
Assume that 
and 
at 
(when the switch is closed).
A. I = 4 × 10-3 e-0.25t B. I = 4 × 10-3 e-t C. I = 1.6 × 10-2 e-t D. I = 1.6 × 10-2 e-0.25t
Determine the validity of the argument.Some investments are risky.Real estate is an investment.Therefore real estate is risky.
A. Not valid B. Valid
The graph of a trigonometric function of the form y = A sin (Bx) or y = A cos (Bx) for B > 0 is given. Determine the equation of the function represented by the graph.
A. y = 3 sin 
x
B. y = 3 sin 2x
C. y = 2 sin 
x
D. y = 2 sin 3x
Graph the equation.f(x) = - 
(x + 5)2 + 3
A. 
B. 
C. 
D. 