Find the derivative.f(x) = 5
+ 
- 5
+ 4
A. 
x-1/2 + 
x-2/3 + 
x-3/4 + 
x-4/5
B. 
x1/2 + 
x2/3 - 
x3/4 + 
x4/5
C. 
x-1/2 + 
x-1/3 - 
x-1/4 + 
x-1/5
D. 
x-1/2 + 
x-2/3 - 
x-3/4 + 
x-4/5
Answer: D
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Solve.The motion of a projectile that is fired at a 60° angle with the horizontal is given by x = 
t, 
for t in 
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A. (a) 12.5 seconds (b) 4330 feet B. (a) 21.7 seconds (b) 4330 feet C. (a) 6.3 seconds (b) 625 feet D. (a) 10.8 seconds (b) 5625 feet
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A. 250% B. 500% C. 20% D. 50%
Find the exact value of y, or state that y is undefined.y = cos-1 
A. - 
B. 
C. 
D. 