Solve the problem.A borrower uses an income tax refund to pay off the balance on a fixed installment loan. Which rules or methods can be used to compute the amount of interest he will save?
What will be an ideal response?
Either the actuarial method or the rule of 78s.
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Solve the problem.Use the formula N = Iekt, where N is the number of items in terms of the initial population I, at time t, and k is the growth constant equal to the percent of growth per unit of time. An artifact is discovered at a certain site. If it has 54% of the carbon-14 it originally contained, what is the approximate age of the artifact? (carbon-14 decays at the rate of 0.0125% annually.)
A. 3680 years B. 2141 years C. 4320 years D. 4929 years
Solve the problem.The population growth of an animal species is described by 
where t is measured in months. Find the population of this species in an area 6 months after the species is introduced.
A. 704 B. 470 C. 74 D. 240
Solve and graph the solution set on a number line.
? 15
A. [-7, 3]
B. (-9, 1)
C. (-7, 3)
D. [-9, 1]
Find the vertices and locate the foci for the hyperbola whose equation is given.25y2 - 9x2 = 225
A. vertices: (-3, 0), (3, 0)
foci: (-
, 0), (
, 0)
B. vertices: (-5, 0), (5, 0)
foci: (-4, 0), (4, 0)
C. vertices: (0, -3), (0, 3)
foci: (0, -
), (0, 
)
D. vertices: (0, -5), (0, 5)
foci: (0, -
), (0, 
)