A $100 MP3 player is marked up by 10% and then marked down by 10%. What is the final price? Explain your answer.

"if it is my birthday, then it is snowing"

use this formula:

p(a\b) = p(a and b)/p(b).

take it from here.

ummm seems that u didnt post the attachement !

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