Simplify.(0.7x + 0.6)2
A. 0.49x2 - 0.84x + 0.36
B. 0.49x2 + 0.84x + 0.36
C. 0.49x2 - 0.84x - 0.36
D. 0.49x2 + 0.36
Answer: B
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Use implicit differentiation to find dy/dx and d2y/dx2.x2 - y3 = 3
A. 
= 
; 
= 
B. 
= 
; 
= 
C. 
= 
; 
= 
D. 
= 
; 
= 
Find the quotient.
A. 9 B. 1.9 C. 0.9 D. 19
Find the nth term and the indicated term of the arithmetic sequence {an} whose initial term, a, and common difference, d, are given.a1 = 
; d = 
an = ?; a21 = ?
A. an = 
n + 
; a21 = 22
B. an = 
n; a21 = 21
C. an = - 
n; a21 = - 21
D. an = 
n - 
; a21 = 20
A rectangular corral with a total area of 60 square meters is to be fenced off and then divided into 2 rectangular sections by a fence down the middle. 
The fencing for the outside costs $9 per running meter, whereas that for the interior dividing fence costs $12 per running meter. Which of the following statements hold, if the cost (c) of the fencing is to be maximized?(I)The constraint equation is 3w + 2 l = 60 .(II)The objective equation is 2l ? w = 60 .(III)The constraint equation is w ? l = 60 .(IV)The objective equation is C = 30w + 18l .(V)The constraint equation is C = 12w + 9wl .(VI)The objective equation is C = 60 - lw .
A. V and VI B. III and IV C. I and II D. none of these