Solve the problem.The winning speeds for the Grayslake 250 race from 1980-1992 are approximated by the linear equation 
In the model, x = 0 corresponds to 1980, x = 1 to 1981, and so on. A portion of the graph of the equation is shown on the accompanying screen, along with the coordinates of a point on the line. How can this point be interpreted in the context of the model?
A. It means that the winning speed in the year 1990 will be the same as in the year 2203.
B. It means that the winning speed was between 10 and 224 miles per hour.
C. It means that in the year 1990, the winning speed was approximately 224 miles per hour.
D. It means that 10 years from now, the winning speed will be approximately 224 miles per hour.
Answer: C
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Solve the problem.Police use a formula s = S 
, where S is the test-car speed (mph) and L is the test-skid length (feet), to find the actual speed s in an accident which left a skid mark of length l. Find the actual speed (to the nearest tenth) when S = 63 mph, l = 150 ft, L = 100 ft.
A. 77.2 mph B. 113.0 mph C. 51.7 mph D. 94.5 mph
On the coordinate plane below, plot the points with the given coordinates.A(0, -5), B (-3, 0)
A. 
B. 
C. 
D. 
Solve the problem.The perimeter of a rectangular room is 42 ft. The width is 7 ft. Find the length.
A. 15 ft B. 13 ft C. 14 ft D. 35 ft
Find the center of mass of the particles with the given masses located at the given points.18 at (4.9, 0), 21 at (-9.8, 0), 37 at (2.5, 0), 40 at (-8.2, 0)
A. 
= 0.909, 
= 0
B. 
= 33.3, 
= 0
C. 
= -3.04, 
= 0
D. 
= -10.9, 
= 0