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?

Question

anonymous · Answer

@Nnesha  think you could help me with this one?

nnesha · Answer

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

nnesha · Answer

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

anonymous · Answer

0.21

nnesha · Answer

yes right so r =.21

anonymous · Answer

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

nnesha · Answer

ye sright

anonymous · Answer

so now just solve it?

nnesha · Answer

yes

anonymous · Answer

1409.59?

nnesha · Answer

looks right

anonymous · Answer

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

anonymous · Answer

could you help me with 4 more please?

anonymous · Answer

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

nnesha · Answer

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