Find the accumulated amount after 3 years if $1000 is invested at 8% per year compounded continously

Find the interest rate needed for an investment of $10,000 to grow an amount of $18,000 in 5 years if the interest is compounded monthly.

How long will it take an investment of $6000 to double if the investment earns interest at the rate of 8% compounded continuously?

If the cost of a semiprivate room in a hospital was $580/ day 5 yr ago and hospital costs have risen at the rate of 8%/year since that time, what rate would you expect to pay for a semiprivate room today?

In an agreement worked out with its banker, Denver assigns its royalty income of $4800/month for the next 3 yr from certain oil properties to the bank,with the first payment due at the end of the first month. if the bank charges interest at the rate of 9%/ year compounded monthly, what is the amount of the loan negotiated between the parties?

Solve 5ex+2=120

solve
6 ln x-7=12.2

simplify
ln (x+4)2=3