Use the table of values of f to estimate the limit.Let f(x) = 
, find 
f(x).
A. limit = 7.5
B. limit = 8
C. limit = 0
D. limit does not exist
Answer: B
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Solve the initial value problem.Differential Equation: 
= 9t2i - tj Initial Conditions: 
= -10i, r(0) = 7i - 6k
A. r(t) = 
i - 
j - 6k
B. r(t) = 
i + 
j - 6k
C. r(t) = 
i - 
j - 6k
D. r(t) = 
i - 
j - 6k
Evaluate the expression.(-2)0
A. 0 B. 1 C. -2 D. -1
Solve the problem.Consider a retirement savings account where the monthly contribution is $150 for the first 10 years, is increased to $200 for the next 20 years, and then is increased once again to $250 for the last 15 years. The APR is always 5.1% compounded monthly. What is the value of the account at the end of 45 years? Round your answer to the nearest cent.
A. $389,016.83 B. $384,840.75 C. $380,662.67 D. $387,291.43 E. $391,468.51
Use a graphing calculator to plot the data and find the quadratic function of best fit.A small manufacturing firm collected the following data on advertising expenditures (in thousands of dollars) and total revenue (in thousands of dollars). 
Find the quadratic function of best fit.
A. R(x) = -0.024x2 + 7.13x + 6209 B. R(x) = -0.015x2 + 4.53x + 6123 C. R(x) = -0.091x2 + 5.95x + 6337 D. R(x) = -0.31x2 + 2.63x + 6128