Use an equation to solve the problem.Sales tax on a $14 compact disc is $0.84. At what rate is sales tax computed?

A. 2%
B. 6%
C. 8%
D. 5%
E. 3%

Answer: B

Mathematics

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At age 25 you start to work and are offered two retirement options.

? Retirement option 1: When you retire, you receive a lump sum of $25,000 for each year of service. ? Retirement option 2: When you start to work, the company will deposit $10,000 into an account that pays a yearly compound interest rate of 13%. ? A: Write a formula that gives your retirement payment , in dollars, if you retire after t years of service under retirement option 1. ? B: Write a formula that gives your retirement payment , in dollars, if you retire after t years of service under retirement option 2. ? C: Make a graph that shows the retirement payment for each option over the 40 years of service. ? D: How many years of service will result in the same payment from either option? (You will work more than 1 year.) Round your answer to two decimal places if necessary. ? What will be an ideal response?

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Mathematics

Solve the problem.A rectangular swimming pool has a parabolic drain plate at the bottom of the pool. The drain plate is shaped like the region between y = x2 and the line y = from x = -1 to x = 1. The pool is 10 ft by 20 ft and 8 ft deep. If the pool is being filled at a rate of what is the force on the drain plate after 4 hours of filling? Round your answer to two decimal places if necessary.