Solve the problem.A contractor builds two models of homes, the R type and the K type. The R type requires 180 worker-days of labor and $330,000 in capital, while the K type requires 270 worker-days of labor and $220,000 in capital. The contractor has a total of 5400 worker-days and $6,600,000 in capital available per month. Graph the possible combinations of model homes that can be built per month and find the vertices. 
A. 
B. 
C. 
D. 
Answer: B
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Eliminate the parameter of the pair of parametric equations.x = t + 4, y = t2
A. y = 
+ x + 4
B. y = 
C. y = x2 + 16
D. y = x2 - 8x + 16
Solve the problem.Which has the lower present value: (a) $60,000 if interest is paid at a rate of 6.82% compounded continuously for 3 years or (b) $110,000 if interest is paid at a rate of 4.6% compounded continuously for 40 months?
A. (a) has the lower present value. B. (b) has the lower present value. C. Both (a) and (b) have the same present value.
Solve the problem.If an investment of P dollars grows to A dollars in two years, the annual rate of return on the investment is given by 
Jared Spencer bought a collector's coin set for $230 and sold it two years later for $362. What was the approximate annual rate of return of his investment? Round to the nearest tenth of a percent.
A. 28.7% B. 20.4% C. 25.4% D. 7.6%
Solve the equation.192 - x = 28 (Round to the nearest hundredth.)
A. 0.53 B. 0.87 C. -0.53 D. 2.88