Answer:
d. 1134 inches squared
Step-by-step explanation:
The formula for the area of a circle is ![\pi r^2](https://tex.z-dn.net/?f=%5Cpi%20r%5E2)
where r is the radius.
You are given r=19 here so replace r in
with 19 giving us:
![\pi (19)^2](https://tex.z-dn.net/?f=%5Cpi%20%2819%29%5E2)
Then it is to the calculator we go:
1134 inches squared
Answer:
Step-by-step explanation:
<u>The volume formula:</u>
<u>We have:</u>
- V = 2.7 million km³
- b = 339 million km²
<u>Find h:</u>
- h = V/b
- h = 2.7 / 339 = 0.00796460176 km ≈ 7.96 m
<h3><u>Answer</u> :</h3>
![\bigstar\:\boxed{\bf{\dfrac{a^m}{a^n}=a^{m-n}}}](https://tex.z-dn.net/?f=%5Cbigstar%5C%3A%5Cboxed%7B%5Cbf%7B%5Cdfrac%7Ba%5Em%7D%7Ba%5En%7D%3Da%5E%7Bm-n%7D%7D%7D)
<h3><u>Learn More</u> :</h3>
![\dag\sf\:\:a^m\times a^n=a^{m+n}](https://tex.z-dn.net/?f=%5Cdag%5Csf%5C%3A%5C%3Aa%5Em%5Ctimes%20a%5En%3Da%5E%7Bm%2Bn%7D)
![\dag\sf\:\:\dfrac{a^m}{a^n}=a^{m-n}=\dfrac{1}{a^{n-m}}](https://tex.z-dn.net/?f=%5Cdag%5Csf%5C%3A%5C%3A%5Cdfrac%7Ba%5Em%7D%7Ba%5En%7D%3Da%5E%7Bm-n%7D%3D%5Cdfrac%7B1%7D%7Ba%5E%7Bn-m%7D%7D)
![\dag\sf\:\:a^{-m}=\dfrac{1}{a^m}](https://tex.z-dn.net/?f=%5Cdag%5Csf%5C%3A%5C%3Aa%5E%7B-m%7D%3D%5Cdfrac%7B1%7D%7Ba%5Em%7D)
![\dag\sf\:\:(a^{m})^n=a^{mn}](https://tex.z-dn.net/?f=%5Cdag%5Csf%5C%3A%5C%3A%28a%5E%7Bm%7D%29%5En%3Da%5E%7Bmn%7D)
![\dag\sf\:\:a^1=a](https://tex.z-dn.net/?f=%5Cdag%5Csf%5C%3A%5C%3Aa%5E1%3Da)
![\dag\sf\:\:a^0=1](https://tex.z-dn.net/?f=%5Cdag%5Csf%5C%3A%5C%3Aa%5E0%3D1)
![\dag\sf\:\:\sqrt[n]{a^m}=a^{\frac{m}{n}}](https://tex.z-dn.net/?f=%5Cdag%5Csf%5C%3A%5C%3A%5Csqrt%5Bn%5D%7Ba%5Em%7D%3Da%5E%7B%5Cfrac%7Bm%7D%7Bn%7D%7D)
2x -3y = 13
4x -y = -9
Multiply the second equation by -3 to make the coefficient of Y opposite the first equation.
4x -y = -9 x -3 = -12x + 3y = 27
Now add this to the first equation:
2x -12x = -10x
-3y +3y = 0
13 +27 = 40
Now you have :
-10x = 40
Divide each side by -10:
x = 40 / -10
x = -4
Now you have a value for x, replace that into the first equation and solve for y:
2(-4) - 3y = 13
-8 - 3y = 13
Add 8 to both sides:
-3y = 21
Divide both sides by -3:
y = 21/-3
y = -7
Now you have X = -4 and y = -7
(-4,-7)