Solve the problem.The motion of a projectile that is fired at a 60° angle with the horizontal is given by x = 
t, 
for t in 
Suppose a projectile is fired with an initial velocity of 700 feet per second at an angle of 60° with the horizontal. Find (a) the time when it strikes the ground and (b) the range (horizontal distance covered).
A. (a) 21.9 sec
(b) 13,261 ft
B. (a) 37.9 sec
(b) 13,261 ft
C. (a) 18.9 sec
(b) 17,227 ft
D. (a) 10.9 sec
(b) 1914 ft
Answer: B
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Solve the problem.The position(in feet) of an object oscillating up and down at the end of a spring is given by 
at time t (in seconds). The value of A is the amplitude of the motion, k is a measure of the stiffness of the spring, and m is the mass of the object. Find the object's velocity at time t.
A. v = - A
cos 
ft/sec
B. v = A
cos 
ft/sec
C. v = A
cos 
ft/sec
D. v = A cos 
ft/sec
Find the derivative at each critical point and determine the local extreme values.y = x2/3(x2 - 1); x ? 0
A. 
B. 
C. 
D. 
Solve the problem.Sue and Tom are getting a divorce. Except for the house, they own very little of value so they agree to divide the house fairly using the method of sealed bids. Sue bids 100,000 and Tom bids 90,000. After all is said and done, the final outcome is
A. Sue gets the house and pays Tom $50,000. B. Sue gets the house and pays Tom $55,000. C. Sue gets the house and pays Tom $45,000. D. Sue gets the house and pays Tom $47,500. E. none of these
Write an expression in simplest form for the perimeter of the shape.
A. 8x + 28 B. x(x + 7) C. 2x + 7 D. 4x + 14