Simplify the ratio.66 cents to 84 cents
A. 
B. 
C. 
D. 
Answer: A
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Solve the differential equation.y' + 2xy = 19x
A. y = 19 + Cex2
B. y = 
+ Cex2
C. y = 
+ 2x + Ce-x2
D. y = 
+ Ce-x2
Find the inclination of the line with the given slope. Round your answer to the nearest tenth of a degree, if necessary.0.704
A. 99.9° B. 54.9° C. 9.9° D. 35.1°
Solve the problem.A certain radioactive isotope has a half-life of approximately 1750 years. How many years to the nearest year would be required for a given amount of this isotope to decay to 35% of that amount?
A. 1138 yr B. 1088 yr C. 2651 yr D. 2616 yr
Solve the problem.Tides go up and down in a 12.4-hour period. The average depth of a certain river is 11 m and ranges from 8 to 14 m. The variation can be approximated by a sine curve. Write an equation that gives the approximate variation y, if x is the number of hours after midnight if high tide occurs at 8:00 am.
A. y = 11 sin (
- 
)
B. y = 3 sin (
- 
)
C. y = 3 sin (
- 
)
D. y = 11 sin (
- 8?)