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3. Simplify
x+2 – 3x-5
x-2 x^2+2x-8
a. 4x-3
x^2+2x-8
b. x^2+3x+13
x^2+2x-8
c. -2x+7
x^2+2x-8
d. x^2+9x+3
x^2+2x-8
6. Annual revenue for a company is given by this formula
Reveue( t ) = t^2 -12t+ 27
where Revenue(t) is the annual revenue for year t. What is the annual revenue for year 5?
a. 40
b. 8
c. -8
d. 0
8. Find the derivative of this function. If you print this page, make sure that your printer
shows the fractional exponents that you see here.
f ( x )=3x^1 / 2-4x^-2
a. 3x^-1 /2+8x^3
b. 1.5x^-1 / 2+8x^-3
c. 1.5x^1 / 2+8x^-3
d. 1.5x^1 / 2+8x^-1
9. Find the derivative of this function
f ( x )= (3 x+2)^2
(2x-5)
a. 3x + 2
b. 2(2x-5)(3x+2)-2(3x+2)^2
(2x-5)^2
c. 6(2x-5)(3x+2)-2(3x+2^2)
(2x-5)^2
d.6( 3x+2 )
2
10. Reconsider the revenue function from question 6. How fast is revenue changing at year 5?
a. 8
b. 4
c. -8
d. -2