Answer:
![48.98\%](https://tex.z-dn.net/?f=48.98%5C%25)
Step-by-step explanation:
we know that
The probability that it will hit a point in the outer (yellow) ring is equal to divide the area of the yellow ring by the total area of the target
step 1
Find the area of the yellow ring
![A=\pi [7^{2} -5^{2}]](https://tex.z-dn.net/?f=A%3D%5Cpi%20%5B7%5E%7B2%7D%20-5%5E%7B2%7D%5D)
![A=24\pi\ cm^{2}](https://tex.z-dn.net/?f=A%3D24%5Cpi%5C%20cm%5E%7B2%7D)
step 2
Find the total area of the target
![A=\pi [7^{2}]](https://tex.z-dn.net/?f=A%3D%5Cpi%20%5B7%5E%7B2%7D%5D)
![A=49\pi\ cm^{2}](https://tex.z-dn.net/?f=A%3D49%5Cpi%5C%20cm%5E%7B2%7D)
step 3
Find the probability
![24\pi/49\pi=0.4898](https://tex.z-dn.net/?f=24%5Cpi%2F49%5Cpi%3D0.4898)
Convert to percentage
![0.4898*100=48.98\%](https://tex.z-dn.net/?f=0.4898%2A100%3D48.98%5C%25)
12 feet squared or 3 feet squared. hopefully this helps i got 2 different answers
Loga x=n ⇔ a^n=x
log₇ 21=x
x=log ₇ 21
x=ln 21 / ln7=1.564575034...
Answer: x=log₇ 21