Solve the variation problem.The gravitational attraction between two masses varies inversely as the square of the distance between them. If 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. 3 lb
C. 1 lb
D. 2 lb
Answer: C
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Solve the problem. Use 3.14 for ?, if necessary.Find the area of the skating rink. Round to the nearest tenth.
A. 1720.3 sq yd B. 1312.3 sq yd C. 860.2 sq yd D. 1268.2 sq yd
Solve the problem.A ball is thrown downward from a window in a tall building. Its position at time t in seconds is 
where s is in feet. How long will it take the ball to fall 174 feet?
A. 5.8 sec B. 2.4 sec C. 3.3 sec D. 2.2 sec
Without graphing, decide:(a) Are the graphs of the equations are identical lines, parallel lines, or lines intersecting at a single point?(b) How many solutions does the system have?
A. lines intersecting at a single point; one solution B. identical lines; infinite number of solutions C. parallel lines; no solution
Find the slope of the line that passes through the given two points. If the slope is undefined, state this.(2, -5) and (2, 3)
A. 2 B. Undefined C. 4 D. 8