Evaluate f(x) at the given value of x.f(x) = 4x - 4; x = -3
A. -16
B. -14
C. 15
D. 16
Answer: A
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A metal bar is heated and then placed on a workbench for bending. The temperature B, in degrees Fahrenheit, t minutes after heat is applied is given by
.
?
The bar can be worked so long as its temperature is higher than 440 degrees. For what values of t is the bar suitable for working? Round your answer to two decimal places.
?
A. 
minutes
B. 
minutes
C. 
minutes
D. 
minutes
Solve the given differential equation.
- 2
= 3x - e-2x
A. y = c1 + c2e-2x + 
x2 - 
x - 
xe-2x
B. y = c1 + c2e-2x - 
x + 
xe-2x
C. y = c1 + c2e-2x - 
x2 + 
x + 
xe-2x
D. y = c1 + c2e-2x + 
x2 - 
x + 
xe-2x
Solve the problem.A diving pool that is 9 m deep and full of water has a viewing window on one of its vertical walls. Find the force on a square window, 1.5 m on a side, with the lower edge of the window on the bottom of the pool.
A. 29,700 N B. 181,912.5 N C. 396,900 N D. 16,537.5 N
Given f(x) and g(x), find the composition.f(x) = -9x + 7; g(x) = 4
Find (g ? f)(x).
A. -9
+ 7
B. 4
+ 7
C. 4
D. 4 + 