William bought a new backpack at the store when they were having a 40% off sale. if the regular price of the backpack was $35, how much did william pay with the discount?

answer: t=3

step-by-step explanation:

this is the formula: v = the value of investment at the end of the time period

p = the principal amount (the initial amount invested)

r = the annual interest rate

n = the annual frequency of compounding (how many times a year interest is added)

t = the number of years the money is invested

^ means raise to the power of