Answer:
D
Step-by-step explanation:
The area and the radius of a sphere are related by the formula:
A=4πr^2
Let’s say this is A1 and r1
Now the radius is tripled. This means r2 = 3r1
The new area thus becomes: A = 4 * (3r)^2 * π = 36πr^2
Comparing A1 and A2 , we can see that A2 = 9A1
I got 12 because each time you are dividing the number in half. Half of 24 is 12.
Answer:
![\frac{a^2}{b^2}](https://tex.z-dn.net/?f=%5Cfrac%7Ba%5E2%7D%7Bb%5E2%7D)
Step-by-step explanation:
Apply the exponent rule
to a
![a^4*a^-^2=a^4^-^2=a^2](https://tex.z-dn.net/?f=a%5E4%2Aa%5E-%5E2%3Da%5E4%5E-%5E2%3Da%5E2)
![b^3a^2b^-^5](https://tex.z-dn.net/?f=b%5E3a%5E2b%5E-%5E5)
Apply the exponent rule to b
![b^3*b^-^5=b^3^-^5=b^-^2](https://tex.z-dn.net/?f=b%5E3%2Ab%5E-%5E5%3Db%5E3%5E-%5E5%3Db%5E-%5E2)
Apply the exponent rule ![a^-^b=\frac{1}{a^b}](https://tex.z-dn.net/?f=a%5E-%5Eb%3D%5Cfrac%7B1%7D%7Ba%5Eb%7D)
![b^-^2=\frac{1}{b^2}=\frac{1}{b^2}a^2=\frac{a^2}{b^2}](https://tex.z-dn.net/?f=b%5E-%5E2%3D%5Cfrac%7B1%7D%7Bb%5E2%7D%3D%5Cfrac%7B1%7D%7Bb%5E2%7Da%5E2%3D%5Cfrac%7Ba%5E2%7D%7Bb%5E2%7D)
70 x 9.50 = 665 so 1000 - 665 =335 and 335 / 9.50 = 35 so, it needs 35 more tickets to get 1000.