Solve.A carpenter wants to cut the largest possible ellipse from a 1 ft by 10 ft rectangular board. After the foci are located, a string is connected to them and pulled taut by a pencil in order to draw the ellipse. Find the length of the string.
A. 20 ft
B. 10 ft
C. 2 ft
D. 1 ft
Answer: B
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Factor completely using the grouping method to factor trinomials. If unfactorable, indicate that the polynomial is prime.18y2 + 81y - 45
A. (18y - 9)(y + 5) B. 9(2y - 1)(y + 5) C. 9(2y + 1)(y - 5) D. prime
Convert the polar equation to a rectangular equation. Then determine the graph's slope and y-intercept.r cos 
= 1
A. y = -x
+ 2; slope: -
; y-intercept: 2
B. y = x
- 2; slope: 
; y-intercept: -2
C. y = x
+ 2; slope: 
; y-intercept: 2
D. y = -x
- 2; slope: -
; y-intercept: -2
The given pattern continues. Write down the nth term of the sequence {an} suggested by the pattern.3, -6, 9, -12, ...
A. an = (-1)n ? 3 B. an = (-1)n + 1 ? 3 C. an = (-1)n ? 3n D. an = (-1)n + 1 ? 3n
Write the number in scientific notation.107
A. 1.07 x 103 B. 1.07 x 10-2 C. 1.07 x 102 D. 1.07 x 101