The size of the monthly repayment k that amortizes a loan of A dollars in N years at an interest rate of r per year, compounded monthly, on the unpaid balance is given by 
The value of r can be found by performing the iteration 
A family secured a loan of $360,000 from a bank to finance the purchase of a house. They have agreed to repay the loan in equal monthly installments of $2476 over 25 years. Find the interest rate on this loan. Round the rate to one decimal place.
What will be an ideal response?
6.7%
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Solve the equation.21s + 40 = -4s
A. 
B. - 
C. 
D. 
Solve the problem.A flare fired from the bottom of a gorge is visible only when the flare is above the rim. If it is fired with an initial velocity of 
and the gorge is 224 ft deep, during what interval can the flare be seen?(h = -16t2 + vot + ho.)
A. 6 < t < 11 B. 0 < t < 2 C. 2 < t < 7 D. 4 < t < 9
Provide an appropriate response.The graph of an exponential function is given. Which of the following is the correct equation of the function?
A. y = 0.45x B. y = 0.73x C. y = 2.8x D. y = 3.9x
Solve the problem.The table shows the percentage of people living below the poverty line in one U.S. city in the years 2000 through 2003. 
The data in the table can be written as ordered pairs (x, y) where x is the number of years after 2000 and y is the percentage of people living below the poverty line in that year. Use the data for 2000, 2002, and 2003 to find the quadratic function 
that models the percentage, y, of people in this city living below the poverty line x years after 2000. [Hint: Find a, b, and c by substituting each of three ordered pairs into the
function and writing and solving a system of linear equations in three variables.] A. y = -0.4x2 + 1.6x + 11.0 B. y = -0.5x2 + 1.8x + 11.0 C. y = -0.3x2 + 1.4x + 11.0 D. y = -0.3x2 + 1.3x + 11.0