Use the rules for exponents to rewrite the expression and then evaluate the new expression. (2-2)0
A. 1
B. 
C. 0
D. -4
Answer: A
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Find the standard deviation of the data.Christine is currently taking college astronomy. The instructor often gives quizzes. On the past seven quizzes, Christine got the following scores. Find the standard deviation. Round to the nearest tenth.47 11 39 21 15 44 63
A. 8228.6 B. 39 C. 10,422 D. 19.1
Solve the problem.Assume that the profit generated by a product is given by 
where x is the number of units sold. If the profit keeps changing at a rate of 
per month, then how fast are the sales changing when the number of units sold is 1400? (Round your answer to the nearest dollar per month.)
A. $112,250/month B. $3/month C. $4490/month D. $2245/month
Solve the problem.Stephanie receives a salary of $650 per month plus a commission of 5.5% on the first $3,000 of sales, and 7% of all sales over $3,000. Find Stephanie's gross pay for the month if her sales were $10,110.
A. $2797.70 B. $662.70 C. $1522.70 D. $1312.70
Solve.Find the volume of the rectangular solid. Express the volume as a product, then multiply and simplify. 
A. -4x2 + 22x + 105 B. 4x2 - 42x + 105 C. -4x3 + 22x2 + 104x D. 4x3 - 42x2 + 104x