Use the unit circle to find the indicated quantities.
cos ?; sin ?
A. 0; -1
B. -1; 0
C. 1; 0
D. 0; 1
Answer: B
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Which of the following is true about the following figure?
? x
x + 6 
? y ?
?
A. ?The perimeter is: 18(x + 6). B. ?The value of x is 18. C. ?The value of x + 6 is 12. D. ?The value of y is x + 6. E. ?Both b and d are true.
Find the mass of the wire that lies along the curve r and has density ?.r(t) = (7 cos t)i + (7 sin t)j + 7tk, 0 ? t ? 2?; ? = 2
A. 196?
units
B. 28?
units
C. 4? units
D. 14?
units
Write the expression in standard form.
A. 
- 
i
B. 
- 
i
C. 
+ 
i
D. 
- 
i
Solve the problem.Mrs. Hernandez prepared her grocery list at home. Her list contained the following items with their sale prices: cheese - 
soda - 
; hamburger - 
; and gum - 
. She bought all of the items at the store except the crackers. How
much money did she spend? A. $23.86 B. $22.86 C. $21.89 D. $22.89