Solve the problem.A ball is thrown vertically upward from the ground at a velocity of 98 feet per second. Its distance from the ground after t seconds is given by 
How fast is the ball moving 4 seconds after being thrown?
A. 136 ft per sec
B. 34 ft per sec
C. -30 ft per sec
D. -42 ft per sec
Answer: C
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Solve.
= 9 - 
A. 2
B. 
C. 1
D. 
The eccentricity is given of a conic section with one focus at the origin, along with the directrix corresponding to that focus. Find a polar equation for the conic section. e = 3, x = 8
A. r = 
B. r = 
C. r = 
D. r = 
Write the expression in the form a + bi.
A. 
- 
i
B. 
+ 
i
C. - 
- 
i
D. - 
+ 
i
For each quadratic function, find (a) the maximum or minimum value and(b) the x- and y-intercepts.Round answers to the nearest hundredth.f(x) = -11.9x2 - 6.93x + 7.49
A. Maximum value: 8.50; Intercepts: (-0.55, 0), (1.14, 0), (0, -7.49) B. Minimum value: 8.50; Intercepts: (-1.14, 0), (0.55, 0), (0, 7.49) C. Maximum value: 8.50; Intercepts: (-1.14, 0), (0.55, 0), (0, 7.49) D. Maximum value: 8.50; No x-intercepts, (0, 7.49)