Solve the problem. Round your answer to the nearest tenth, if necessary.A jet plane traveling at a constant speed goes 1200 mi with the wind, then turns around and travels for 1000 mi against the wind. If the speed of the wind is a constant 50 mph, and the total flight took 4 hours, find the speed of the plane.
A. 525 mph
B. 550 mph
C. 605 mph
D. 435 mph
Answer: B
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Find the slope of the curve at the indicated point.y = x2 + 5x - 8, x = 1
A. m = -1 B. m = 7 C. m = 2 D. m = 6
Describe the graph of the polar equation. 9r cos ? + r sin ? = 6
A. Vertical line passing through (9, 0) B. Parabola with vertex (9, 6) opening upward C. Line with slope 6 and y-intercept (0, 9) D. Line with slope -9 and y-intercept (0, 6)
Suppose 100 people counted the number of cars passing an intersection in one hour. Due to error, not all people get the same value. The mean is 75 and the standard deviation is 1. Use the sketch to find how many people report the following. 
Between 74 and 76 cars
A. 50 people B. 34 people C. 84 people D. 68 people
Find the inverse of the function.f(x) = -x2 + 12, x ? 0
A. f-1(x) = - 
B. f-1(x) = 
C. f-1(x) = 
D. f-1(x) = x2 + 12