Solve the problem.It costs $42 per hour plus a flat fee of $23 for a plumber to make a house call. Find the number of hours a plumber worked if the total cost was $233.
A. 5
B. 17
C. 16
D. 4
Answer: A
Mathematics
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Evaluate the integral.
A. 1944?
B. 
?
C. 
?
D. 
?
Mathematics
Find the expected value.Suppose that 1,000 tickets are sold for a raffle that has the following prizes: one $300 prize, two $100 prizes, and one hundred $1 prizes. What is expected value of a ticket?
A. $300 B. $0.60 C. $1 D. $100
Mathematics
Find an equation of a parabola that satisfies the given conditions.Focus at (4, 0), directrix x = -4
A. y2 = 16x B. 16y2 = x C. 16y = x2 D. 16x = y2
Mathematics
The polar coordinates of a point are given. Find the rectangular coordinates of the point.(4, 70°) Round the rectangular coordinates to two decimal places.
A. (1.37, 3.76) B. (4.01, 1.59) C. (1.59, 4.01) D. (3.76, 1.37)
Mathematics