Solve the problem. Round approximations to the nearest cent.The United Way had six large donations: $3682.38, $8297.90, $1237.77, $6721.73, $4216.67, and $3083.82. Find the mean donation.
A. $6810.07
B. $5436.05
C. $4540.05
D. $5448.05
Answer: C
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Write the rational expression in simplest form.
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A. 
B. ?
C. ?
D. ?
E. ?
Solve the problem.The level of a sound in decibels (db) is determined by the formula 
where I is the intensity of the sound in watts per square meter. What is the intensity of a noise measured at 53 db? Express the answer in scientific notation, rounded to two decimal places.
A. 2.00 × 10-7 watt/m2 B. 2.00 × 1014 watt/m2 C. 5.30 × 10-10 watt/m2 D. 2.00 × 10-6 watt/m2
Graph the function.f(x) = 3000(0.002)0.5x
A. 
B. 
C. 
D. 
Given the set sketched on the number line, identify the type of interval (open, closed, half-open, open infinite, closed infinite), write the set using set-builder notation, and write the set using interval notation.
A. half-open interval; {x|-9 < x ? -3}; (-9, -3] B. closed interval; {x|-9 ? x ? -3}; [-9, -3] C. half-open interval; {x|-9 ? x < -3}; [-9, -3) D. open interval; {x|-9 < x < -3}; (-9, -3)