Translate the sentence into a mathematical equation. Be sure to identify the meaning of all symbols.The surface area of a sphere is 4? times the square of the radius.
A. If S represents the surface area and r the radius, then S = ?r2.
B. If S represents the surface area and r the radius, then S = 4?r2.
C. If S represents the surface area and r the radius, then S = 4?r.
D. If S represents the surface area and r the radius, then 4?S = r2.
Answer: B
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Determine whether the equation defines y as a function of x.y = x2 + 1
A. Yes B. No
Solve the equation. If an answer is not exact, give the answer to four decimal places.
?
?
Enter your answer(s) as numbers. If there is more than one answer separate them with commas.
What will be an ideal response?
Find the LCD for the rational expression.
, 
A. 5x(x + 1) B. 5x2(x + 1) C. 5(x + 1) D. 25x2(x + 1)
Find an equation for the ellipse described.Center at (0, 0); focus at (-4, 0); vertex at (8, 0)
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1