Use scientific notation to perform the following operations. Leave your answer in scientific notation.(5 × 109) - (3 × 108)
A. 4.7 × 109
B. 4.7 × 108
C. 2 × 109
D. 2 × 101
Answer: A
Mathematics
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Write the reciprocal of the number.
A. -15
B. 
C. 15
D. -1
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Solve the problem.Maha checked the outside temperature at noon one day and found it was 28° C. At 10 PM when he checked, the outside temperature was 17° C. How much, in degrees Fahrenheit, did the temperature drop between noon and 10 PM?
A. -7.2°F B. 6.11°F C. -12.2°F D. 19.8°F
Mathematics
Find the function f?g and its domain if 
and 
.
What will be an ideal response?
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How long will it take an investment of $8,000 to double if the investment earns interest at the rate of 8% / year compounded monthly? Round your answer to the nearest tenth. ? __________ year(s)
Fill in the blank(s) with the appropriate word(s).
Mathematics