## anonymous one year ago Zeus Industries bought a computer for \$2859. It is expected to depreciate at a rate of 21% per year. What will the value of the computer be in 3 years?

1. anonymous

@Nnesha think you could help me with this one?

2. Nnesha

depreciate means decrease so you have to use this formula $\huge\rm y = a(1-r)^t$ a = initial amount r= rate t = years substitute values solve for y

3. Nnesha

and first you need to divide 21/100 change percent to decimal

4. anonymous

0.21

5. Nnesha

yes right so r =.21

6. anonymous

so the equation looks like y=2859(1-.21)^3

7. Nnesha

ye sright

8. anonymous

so now just solve it?

9. Nnesha

yes

10. anonymous

1409.59?

11. Nnesha

looks right

12. anonymous

and rounded to the nearest cent would be 1409.60? if it was1409.598?

13. anonymous

could you help me with 4 more please?

14. anonymous

A radio active isotope decays according to the exponential decay equation where t is in days. Round to the thousandths place. For the half life: The half life is the solution (t) of the equation : a/2=ae^−3.568t

15. Nnesha

i have to go close this post and make new one so other people able to help u sorry