Help pleaaaseeee..
1) Find the balance in the account $2000 principle earning 7% compounded semi-annually after 25 years.

2)A tractor costs $14,340 and depreciates in value by 15% per year. How much will the tractor be worth after 3 years?

Question

Help pleaaaseeee.. 
1) Find the balance in the account $2000 principle earning 7% compounded  semi-annually after 25 years.

2)A tractor costs $14,340 and depreciates in value by 15% per year. How much will the tractor be worth after 3 years?

anonymous · Answer

i forgot how to do 1 but i can help on 2

anonymous · Answer

$$21000\times \left(1+\frac{.07}{2}\right)^{50}$$ for the first one 
that, and a calculator

anonymous · Answer

okay since it depreciates by 15 every year for 3 years you would multiply .15 by 3 ( i put 15% in decimal form then it's more easier to calculate)

anonymous · Answer

.15 times 3 is .45

anonymous · Answer

now you would do 14,340 times .45 which is $6,453

anonymous · Answer

got it??

anonymous · Answer

yepp no problem!! Happy to help

anonymous · Answer

unfortunately it is wrong

anonymous · Answer

way wrong sorry

anonymous · Answer

how?

anonymous · Answer

to decrease a number by $15\%$ you multiply it by $100\%-15\%=85\%=.85$

anonymous · Answer

to do it three times in a row, once for each year, you multiply it by $.85^3$

anonymous · Answer

the answer you are looking for is found by computing 
$$14,340\times (.85)^3$$

anonymous · Answer

can u please help me and explain it to me more tomorrow.. @satellite73