Solve the problem.How long will it take for $3800 to grow to $31,300 at an interest rate of 4.5% if the interest is compounded continuously? Round the number of years to the nearest hundredth.
A. 46.86 yr
B. 4685.82 yr
C. 0.47 yr
D. 4.69 yr
Answer: A
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Use the method of variation of parameters to solve the differential equation.y'' + y = sec x tan x
A. y = C1 cos x + C2 sin x - sin x(x + tan x) + sin x ln|csc x| B. y = C1 cos x + C2 sin x + sin x(x - tan x) + cos x ln|sec x| C. y = C1 cos x + C2 sin x + cos x(x - tan x) + sin x ln|sec x| D. y = C1 cos x + C2 sin x + cos x(x - tan x) + cos x ln|sec x|
Solve the problem.Roberto invested some money at 7%, and then invested $2000 more than twice this amount at 9%. His total annual income from the two investments was $3680. How much was invested at 9%?
A. $6000 B. $30,000 C. $3000 D. $28,000
If 
and 
are both right angles, then one can conclude that:
A. a? b B. b? d C. a || b D. None of These
Provide the proper response.Explain how radical denominators are rationalized.
What will be an ideal response?