Use the compound-interest formula to find the account balance with the given conditions: P = principal, r = interest rate, t = time, in years.P = $900, t = 9, r = 5.1% compounded daily
A. $1424.20
B. $142.42
C. $88,361.45
D. $1422.86
Answer: A
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Find the polar coordinates of the point(s) of intersection of the given curves for 
r = 2 cos ?, r = 2 cos 2?
A. 
, 
, (0, 0)
B. 
, 
C. 
, 
D. 
, 
, (2, 0)
Find the first term and the common difference for the arithmetic sequence. Round approximations to the nearest hundredth.a5= 15, a21= 95
A. a1= -5, d = 5 B. a1= 80, d = -5 C. a1= -5, d = 80 D. a1= 80, d = 5
Sketch the graph of the polynomial function.f(x) = x3 + 7x2 + 11x + 5
A. 
B. 
C. 
D. 
Solve the problem.The price of electric guitars has varied considerably in recent years. The data in the table relates the price P, in dollars, to time t, in years. a) Use a graphing utility to find the cubic function of best fit that models the relation between year and the price of an electric guitar. Round all values to three decimal places.b) Use the model found in part (a) to predict the price of an electric guitar in year 10. 
What will be an ideal response?