For the following functions and solve the equation ) = ). express your solutions in terms of logarithms.
) = 10(3.7)^x+1, ) = 5(7.4)x

#12 find the value of x. #13 find the value of the variable.

At the beginning of year 1, carlos invests $600 at an annual compound interest rate of 4%. he makes no deposits to or withdrawals from the account. which explicit formula can be used to find the account's balance at the beginning of year 5? what is, the balance?

Mrs. blake's bill at a restaurant is $42.75. she wants to leave the waiter an 18% tip. how much will she pay in all, including the tip?