Answer:
Step-by-step explanation:
He could use either. It would probably be better to use one that already has a variable without a coefficient. which one has that? Let me know if that doesn't make sense.
So the formula for volume is V=(l)(w)(h)
They already gave you the volume so it’s just basic algebra.
730= 10x(9)
81= 10x
8.1=x
So x is equal to 8.1 but in the question it’s say about which indicates to round it so it should be 8 but I’m not 100% sure.
Answer:
n = 22
Step-by-step explanation:
We will use the formula for the present value of an ordinary annuity :
![P.V.=P(\frac{1-(1+r)^{-n}}{r})](https://tex.z-dn.net/?f=P.V.%3DP%28%5Cfrac%7B1-%281%2Br%29%5E%7B-n%7D%7D%7Br%7D%29)
where P = periodic payment
r = rate per period
n = number of periods
Given P = PMT = $400, P.V. = $8,000, i = 0.01, and we have to find n.
Now we put the values in the formula
![8000=400(\frac{1-(1+0.01)^{-n}}{0.01})](https://tex.z-dn.net/?f=8000%3D400%28%5Cfrac%7B1-%281%2B0.01%29%5E%7B-n%7D%7D%7B0.01%7D%29)
After rearranging we have
![\frac{8000\times 0.01}{400}=1-1.01^{-n}](https://tex.z-dn.net/?f=%5Cfrac%7B8000%5Ctimes%200.01%7D%7B400%7D%3D1-1.01%5E%7B-n%7D)
![20\times 0.01=1-1.01^{-n}](https://tex.z-dn.net/?f=20%5Ctimes%200.01%3D1-1.01%5E%7B-n%7D)
= 1 - 0.2
= 0.8
Taking log on both sides
-n log 1.01 = log 0.8
= 22.4257
Therefore, n = 22
So there are total 22 payments