Use the RSTC Approach to solve the application.By switching service providers, a family's telephone bill decreased from about $50 a month to about $44. What was the percent of decrease?
A. 13%
B. 13.6%
C. 12%
D. 6%
Answer: C
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Solve the problem by writing an appropriate system of equations and using the inverse of the coefficient matrix to solve the system.A $100,000 trust is to be invested in bonds paying 8%, CDs paying 7%, and mortgages paying 10%. The bond and CD investment must be triple the mortgage investment. To earn an $8000 annual income from the investments, how much should the bank invest in bonds?
A. $50,000 B. $30,000 C. $25,000 D. $15,000
Solve the problem.Tim and Judy mix two kinds of feed for pedigreed dogs. They wish to make 16 pounds of feed worth $0.38 per pound by mixing one kind worth $0.21 per pound with another worth $0.60 per pound. How many pounds of the cheaper kind should they use in the mix? Round to the nearest whole pound if necessary.
A. 9 pounds B. 12 pounds C. 7 pounds D. 11 pounds
Find the missing parts of the triangle. Round to the nearest tenth when necessary or to the nearest minute as appropriate.a = 6.3 in.b = 13.6 in.c = 15.3 in.
A. A = 24.3°, B = 62.6°, C = 93.1° B. A = 22.3°, B = 62.6°, C = 95.1° C. No triangle satisfies the given conditions. D. A = 26.3°, B = 60.6°, C = 93.1°
Solve the problem.Daniel Patterson owns some real estate that has a fair market value of $171,000. Property in the area is assessed at 39% of market value and his property tax is $3934.71. Find the tax rate as a percent rounded to the nearest tenth.
A. 4.9% B. 5.7% C. 5.9% D. 6.4%