Question

uros are currency used in several European countries . on one day in October 2005, you could exchange 3$ for about 2.5 euros. how many dollars would you have to needed to get 8 euros?

Answer 1

3/2.5 = x/8.....$3 to 2.5 euros = $x to 8 euros
this is a proportion so we cross multiply
(2.5)(x) = (8)(3)
2.5x = 24
x = 24/2.5
x = 9.60 <===