Find the standard-form equation of the ellipse.
A. 
+ 
= 1
B. 9x2 + 4y2 = 1
C. 81x2 + 16y2 = 1
D. 
+ 
= 1
Answer: A
Mathematics
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Solve the problem.The amount of particulate matter left in solution during a filtering process is given by the equation 
where n is the number of filtering steps. Find the amounts left for 
and 
. (Round to the nearest whole number.)
A. 600, 19 B. 600, 9600 C. 600, 38 D. 1200, 38
Mathematics
Use the rules for exponents to rewrite the expression and then evaluate the new expression. 
A. -14 B. -5 C. 0 D. 1
Mathematics
Add or subtract. Simplify your answer to lowest terms.
+ 
A. 
B. 
C. 
D. 
Mathematics
Factor completely. If the polynomial is prime, state this.x4 - 16
A. (x2 + 4)(x - 2)(x + 2) B. (x + 2)2(x - 2)2 C. (x2 + 4)(x2 - 4) D. (x2 - 4)(x - 2)(x + 2)
Mathematics