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 650 feet per second at an angle of 60° with the horizontal. Find (a) the time when it reaches maximum altitude (b) the maximum altitude.
A. (a) 10.2 sec
(b) 1650 ft
B. (a) 70.4 sec
(b) 29,707 ft
C. (a) 35.2 sec
(b) 11,434 ft
D. (a) 17.6 sec
(b) 4951 ft
Answer: D
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Graph the pair of parametric equations with the aid of a graphing calculator.x = 5 cos 2t + 4 cos 6t, y = 5 sin 2t - 4 sin 6t, 0 ? t ? ?
A. 
B. 
C. 
D. 
Which of the following situations involves proportional reasoning?
a. Determining the number of inches a child has grown from one year to the next by looking at doctor's office data. b. Comparing schools by examining the percent increase in test scores at each school from one year to the next. c. Using key words in a word problem to conjecture that division of fractions must be done to solve it. d. All of the above e. None of the above
Solve the system by substitution.x - 7y = 6 x = 8y
A. {(6, 48)}
B. {(-48, -6)}
C. 
D. {(48, 6)}
Simplify.
A. 2
B. 12
C. 6
D. 8