You didn’t specify the amount of years. But the equation for simple interest is I= Prt. To find the simple interest she will earn in x amount of years, you must multiply 1,025 by 0.05. Then you must multiply the answer of that to the number of years you will keep the money in the savings account. After that, you will get the interest after x number of years. Equation - I = 1,025x0.05x(time in years).
18+2.50=20.50 so tax is 10% so you can put that into a calculator as 20.50*0.10 which equals 2.05 so just add 20.50 and 2.05 which is 22.55 is your final answer
I mean it would be A and D because I don't know why they are both the same answer. If 10 books were sold yesterday, at LEAST 20 are needed to make the goal.
