Write the algebraic expression without parentheses.-(-9 + 5y)
A. -9 + 5y
B. 45y
C. 9 + 5y
D. 9 - 5y
Answer: D
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Use scientific notation to perform the following operations. Leave your answer in scientific notation.(3 × 102) + (2 × 101)
A. 5 × 102 B. 3.2 × 102 C. 5 × 101 D. 3.2 × 103
A cleaning process removes 5% of a contaminant from a water source each week. There are initially 595 pounds of the contaminant in the water source. ? A: Write a formula that gives the amount C, in pounds, of the contaminant in the water source after t weeks. ? B: How much contaminant remains after 9 weeks? ? C: Make a graph that shows the amount of contaminant over the first 20 weeks. ? D: When will the contaminant level reach 206.33 pounds? ? Round your answers to two decimal places if necessary. ?
What will be an ideal response?
Solve.
+ 
= 
+ 
A. 
B. 28
C. 
D. 
Solve the problem.A CD store determines the following demand function for a particular CD 
where q = the number of CDs sold per day when the price per CD is x dollars. At a price of $9 per CD will a small increase in price cause the total revenue to increase, decrease, or stay the same?
A. Stay the same B. Increase C. Decrease