Solve.The gravitational attraction A between two masses varies inversely as the square of the distance between them. The force of attraction is 4 lb when the masses are 3 ft apart, what is the attraction when the masses are 6 ft apart?
A. 4 lb
B. 1 lb
C. 3 lb
D. 2 lb
Answer: B
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Solve the problem.Find the skid distance after braking hard at a speed of 85 miles per hour. Use the formula 
where D represents the skid distance in feet on asphalt and S represents the speed of the car in miles per hour. Round to the nearest hundredth when necessary.
A. 1179.59 ft B. 294.9 ft C. 589.8 ft D. 45.63 ft
Complete the square to find the x-intercepts of the function.f(x) = x2 + 18x + 70
A. (9 + 
, 0), (9 - 
, 0)
B. (-9 + 
, 0), (-9 - 
, 0)
C. (9 + 
, 0)
D. (-18 + 
, 0)
Solve the problem.Suppose that f(x) gives the time in hours to travel x miles at 41 miles per hour. If you evaluate 
what are you finding?
A. The miles traveled in 41 hours B. The hours taken to travel 41 miles C. The hours taken to travel 6 miles D. The miles traveled in 6 hours
Solve the problem.A radio telescope has a parabolic surface. If it is 2 m deep and 16 m wide, how far is the focus from the vertex? 
A. 4 m B. 8 m C. 32 m D. 2 m