The probability P, as a percent, that a certain computer keyboard in a public library will last more than t years can be approximated by P = 100e-1.2t (a) What is the probability that the keyboard will last more than 3 years? Round to the nearest tenth. 2.7 2.7 % (b) After how many years will the probability of keyboard failure be 95%? Round to the nearest tenth. X 2.5 yr

If you want to earn 15% annual simple interest on an investment, how much should you pay for a note that will be worth $26,300.00 in 3 months. You should pay $

Based on making 46000 a year and saving 16% of that monthly income what is the monthly amount that should be put into savings ?

You want to get a home loan that nets you $180,000 after paying a fee to your lender of .0225 of the loan amount and additional fees of $3200 (for an appraisal , title fees, etc). What does the loan amount have to be so your net proceeds will be $180,000? Answer in the back of the book: $187,416.88 please help me set up the equation needed to solve and get the correct answer.

If you would like to make $1855 in 3 years, how much would you have to deposit in an account that pays simple interest of 1%?  The answer key says it is 61833.333333. I want to know I it got to this answer.

The doubling time of a bank account balance is 9 years. By what factor does it grow in 36 years? In 45 years? By what factor does the balance grow in 36 years? (Simplify your answer.)

An investment of $4,500 was deposited into an account that pays 7% annual interest. How much money will be in the account 8 years from now? Round your answer to the nearest cent.

You deposit $5000 into an account that earns 4.5% per year simple interest. How many years will it take for the amount in the account to reach at least $16300?

Richard invests $298.66 every month into an account. At the end of 30 years, he has a balance of $181,092.15. What interest did he make over 30 years?

solve for the missing item in the following: Principle: $535 Interest rate: 8% Time: ?? years? Simple interest: $214