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
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
Use the rules for exponents to rewrite the expression and then evaluate the new expression. 
A. -14 B. -5 C. 0 D. 1
Mathematics