Answer:
Step-by-step explanation:
63= 3 * 3 * 7
63 will come in 7th table. 7*9. here 7 is a prime and 9 is composite number. 3*3 = 9. So 63 = 3*3*7
A is correct
C is correct
E is correct
Answer:
r = 6cm
Step-by-step explanation:
Solve for r:
![v = \frac{1}{3} \pi {r}^{2}](https://tex.z-dn.net/?f=v%20%3D%20%20%5Cfrac%7B1%7D%7B3%7D%20%5Cpi%20%7Br%7D%5E%7B2%7D%20)
![12\pi = \frac{1}{3} \pi {r}^{2} \\ 12\pi = \frac{\pi {r}^{2} }{3} \\ 3 \times 12\pi = \pi {r}^{2} \\ 36\pi = \pi {r}^{2} \\ \frac{36\pi}{\pi} = \frac{\pi {r}^{2} }{\pi} \\ \sqrt{ {r}^{2} } = \sqrt{36} \\ r = 6](https://tex.z-dn.net/?f=12%5Cpi%20%3D%20%20%5Cfrac%7B1%7D%7B3%7D%20%5Cpi%20%7Br%7D%5E%7B2%7D%20%20%5C%5C%2012%5Cpi%20%3D%20%20%5Cfrac%7B%5Cpi%20%7Br%7D%5E%7B2%7D%20%7D%7B3%7D%20%20%5C%5C%203%20%5Ctimes%2012%5Cpi%20%3D%20%5Cpi%20%7Br%7D%5E%7B2%7D%20%20%5C%5C%2036%5Cpi%20%3D%20%5Cpi%20%7Br%7D%5E%7B2%7D%20%20%5C%5C%20%20%5Cfrac%7B36%5Cpi%7D%7B%5Cpi%7D%20%20%3D%20%20%5Cfrac%7B%5Cpi%20%7Br%7D%5E%7B2%7D%20%7D%7B%5Cpi%7D%20%20%5C%5C%20%20%5Csqrt%7B%20%7Br%7D%5E%7B2%7D%20%7D%20%20%3D%20%20%5Csqrt%7B36%7D%20%20%5C%5C%20r%20%3D%206)
Answer:
C. X = 10.247
Step-by-step explanation:
X -4.21 = 6.047
just you will add 4.21 to both sides of the equation
X -4.21 + 4.21 = 6.047 + 4.21
X = 10.247
A simpler form of this expression would be 19y-9