Solve the problem.A ball is thrown vertically upward with an initial velocity of 160 feet per second. The distance in feet of the ball from the ground after t seconds is 
For what intervals of time is the ball less than 256 above the ground (after it is tossed until it returns to the ground)?
A. {x ? 2 sec < x < 8 sec}
B. {x ? 0 sec < x < 2 sec and 8 sec > x > 10 sec}
C. {x ? 0 sec < x < 4.5 sec and 5.5 sec > x > 10 sec}
D. {x ? 0 sec < x < 1.5 sec and 8.5 sec > x > 10 sec}
Answer: B
Mathematics
You might also like to view...
Simplify, where possible.5(x + 9)
A. x + 45 B. 5x + 45 C. 45x D. 5x + 9
Mathematics
Solve the problem.Suppose r = 
, v = 
, and w = 
. Find (r + v ) ? w.
A. 
B. -76
C. 
D. 76
Mathematics
Use properties of exponents to simplify the expression. Express answers in exponential form with positive exponents only. Assume that any variables in denominators are not equal to zero.
A. 
B. 8x3y8
C. 
D. 
Mathematics
Find the area bounded by the indicated curves.y = x4 - 6x3, y = 0
A. 
B. 
C. 
D. 
Mathematics