Solve.A plumber's total bill A can be calculated using the formula 
where R is his hourly rate, T is the total labor time in hours, and M is the cost of materials. A plumber bids a particular job at $3200. If materials amount to $865, and his hourly rate is $76 per hour, how many hours should the job take for the estimate to be accurate? (Round to the nearest whole number, if necessary.)
A. 50 hours
B. 31 hours
C. 53 hours
D. 29 hours
Answer: B
Mathematics
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Find the extreme values of the function subject to the given constraint.
A. Maximum: none; minimum: 2 at 
B. Maximum: none; minimum: 
at 
C. Maximum: none; minimum: 
at 
D. Maximum: none; minimum: 
at 
Mathematics
Divide.
÷ 3
A. 6
B. 3
C. 
D. 
Mathematics
Graph the function to find the stated characteristic of the graph.Graph f(t) = 4 sin (2?t) + -1 in 
by 
. State the amplitude.
A. 3 B. 4 C. -1 D. -4
Mathematics
Determine if the given ordered triple is a solution of the system.x - y + z = 0x + y + z = -8x + y - z = -2(-1, -4, -3)
A. No B. Yes
Mathematics