Solve the problem.A rock falls from a tower that is 83.3 m high. As it is falling, its height is given by the formula 
with t in seconds. How many seconds will it take for the rock to hit the ground (h = 0)?
A. 8.9 sec
B. 1416.1 sec
C. 4.1 sec
D. 9.1 sec
Answer: C
You might also like to view...
Solve the problem.Write an iterated triple integral in the order 
for the volume of the rectangular solid in the first octant bounded by the planes 
, 
, and 
.
A. 
B. 
C. 
D. 
Use the Trapezoidal Rule with n = 4 steps to estimate the integral.
A. 
B. 
C. 
D. 
Solve the problem.A rectangular piece of cardboard measuring 12 inches by 34 inches is to be made into a box with an open top by cutting equal size squares from each corner and folding up the sides. Let x represent the length of a side of each such square. What is the maximum volume of this box? If necessary, round to 2 decimal places.
A. 1463.73 B. 1217.88 C. 509.66 D. 16,172.76
Solve.A railroad tunnel is shaped like a semi-ellipse. The height of the tunnel at the center is 26 ft and the vertical clearance must be 13 ft at a point 21 ft from the center. Find an equation for the ellipse.
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1