Write and solve an equation to find the percent increase or decrease. Round your answer to the nearest tenth of a percent, if necessary.By switching service providers, a family's telephone bill decreased from about $50 a month to about $42. What was the percent of decrease?
A. 17%
B. 19%
C. 16%
D.
| 8% |
Answer: C
Mathematics
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The magnitude of earthquake 1 is 5.5. If earthquake 2 is 1,000 times as intense as earthquake 1, then the magnitude of earthquake 2 is (rounded to one decimal place if necessary) ?
A. 8.5 B. 2.5 C. 1,005.5 D. 5,500
Mathematics
Evaluate the integral using the given substitution.
dx , u = x3/2 - 5
A. 
sin3 (x3/2 - 5) + C
B. 
sin (x3/2 - 5) + C
C. 
(x3/2 - 5) + 
sin 2(x3/2 - 5) + C
D. x3/2 - 5 + 
sin 2(x3/2 - 5)+ C
Mathematics
Evaluate the expression without using a calculator.log5 625
A. 4 B. 20 C. 625 D. 5
Mathematics
Convert the decimal to a percent. 0.66
A. 660% B. 0.066% C. 66% D. 6.6%
Mathematics