Solve the problem.$1000 is deposited in an account with an interest rate of r% per year, compounded monthly. At the end of 8 years, the balance in the account is given by 
Find the rate of change of A with respect to r when 
Round answer to the nearest hundredth, if necessary.
A. 
= 80.27
B. 
= 110.11
C. 
= 80.53
D. 
= 109.75
Answer: D
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Solve the problem.Two months ago, there were x horses on a ranch. The number of horses is now 4 times that. Write an expression to show the present number of horses.
A. (4 + 2x) horses
B. 4x horses
C. (4 - x) horses
D. 
horses
Use this graph to answer each question. Big "D" Sales 1989-1990 
MonthWhat was the total increase in sales for the first 6 months from 1989 to 1990?
A. $652,000 B. $18,000 C. $76,000 D. $12,000
Write out the first five terms of the sequence.{sn} = {n2 - n}
A. s1= 0, s2= 2, s3= 6, s4= 12, s5= 20 B. s1= 0, s2= 3, s3= 8, s4= 15, s5= 24 C. s1= 2, s2= 6, s3= 12, s4= 20, s5= 30 D. s1= 1, s2= 4, s3= 9, s4= 16, s5= 25
Find the partial derivative.f(x, y) = e-2x + 3y. Find 
.
A. fx(x, y) = -2e-2x + 3y B. fx(x, y) = -2e-2x C. fx(x, y) = 3e-2x + 3y D. fx(x, y) = e-2x + 3