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 = 4?r2.
B. If S represents the surface area and r the radius, then 4?S =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 S = ?r2.
Answer: A
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?
?
A. not parallel B. parallel
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A. -22.000 B. -4.690 C. -4.695 D. -4.687
Write a variable expression to describe the situation.The ratio of brick houses to wooden houses in a particular city is 5 to 11. Let b = the number of brick houses and w = the number of wooden houses.
A. 
= 
B. 
= 
C. 
= 
D. 
= 
Use the definition or identities to find the exact value of the indicated trigonometric function of the acute angle ?.cos ? = 
Find cot ?.
A. 
B. 
C. 
D. 