Solve the problem. Round your answer to the nearest tenth, when appropriate.A toy rocket is shot vertically upward from the ground. Its distance in feet from the ground in t seconds is given by 
. At what time or times will the ball be 
from the ground?
A. 12.4 sec
B. 192.1 and 203.9 sec
C. 6.2 sec
D. 1.3 and 11.1 sec
Answer: D
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Complete.8 kg = mg
A. 800 B. 8,000,000 C. 0.08 D. 0.008
The table below shows the value V, in dollars, of a certain rare coin t years since 1950. t 0 30 45 54 60 V 30 402 654 1840 2151? A: Use exponential regression to model V as a function of t. Round your answer to two decimal places.B: Plot the exponential model along with the data points.C: According to the exponential model, what is the value of the coin in 2015? Round your answer to the nearest cent.
What will be an ideal response?
Solve the problem.A rectangular swimming pool has a parabolic drain plate at the bottom of the pool. The drain plate is shaped like the region between y = 
x2 and the line y = 
from x = -1 to x = 1. The pool is 10 ft by 20 ft and 8 ft deep. If the pool is being filled at a rate of 
what is the force on the drain plate after 4 hours of filling? Round your answer to two decimal places if necessary.
A. 153.92 lb B. 486.72 lb C. 166.4 lb D. 76.96 lb
The rectangular coordinates of a point are given. Express the point in polar coordinates with 
and 
(
, -
)
A. (
, 315°)
B. (
, 135°)
C. (
, 225°)
D. (6, 225°)