Graph the ellipse and locate the foci.
+ 
= 1
A. foci at (
, 0) and (-
, 0)
B. foci at (2
, 0) and (-2
, 0)
C. foci at (0, 
) and (0, -
)
D. foci at (
, 0) and (-
, 0)
Answer: C
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Simplify the expression. Use positive exponents. Assume variables represent nonnegative numbers.(8a)(5a2)
A. 8a + 5a2 B. 40a3 C. 13a3 D. 40a4
Use the vectors u, v, and w in the accompanying figure to graph the vector. 
v - w
A. 
B. 
C. 
D. 
Triangle ABC is a right triangle with sides of lengths a, b, and c and a right angle at C. Find the indicated trigonometric function value of A. Rationalize denominators containing radicals.a = 3, b = 
; find cos A.
A. 
B. 
C. 
D. 
Write a word name for the number in the sentence.One gallon is equal to 3.7853 liters.
A. Thirty seven thousand and eight hundred fifty-three ten-thousandths B. Three and seven thousand eight hundred fifty-three thousandths C. Thirty seven thousand and eight hundred fifty-three hundredths D. Three and seven thousand eight hundred fifty-three ten-thousandths