Given the surface area of the sphere, for us to obtain the volume we need to get the value of the radius. The surface area of the sphere is given by:
S.A=4πr^2
hence the radius can be calculated as follows;
16=4πr^2
4=πr^2
r=(4/π)^(1/2)
volume of a sphere is given by:
V=4/3πr^3
=4/3*π*(4/π)^(1/2))^3
=32/3 cubic inches
Answer:
1080"
Step-by-step explanation:
12*10= 120
120*9= 1080
Answer:
351π cm^2.
Step-by-step explanation:
Area of shaded part = area of the large circle - area os small circle
= π * (13+7)^2 - π * 7^2
= 400π - 49π
= 351π.
Answer:
$60
Step-by-step explanation:
We can create a proportion to find the markup from original price to the marked up price. A proportion is an equation where two ratios are set equal to each other. We create two fractions using the prices and percents. It is marked up by 20% so we pay 120% of $50.
![\frac{120}{100} =\frac{x}{50}](https://tex.z-dn.net/?f=%5Cfrac%7B120%7D%7B100%7D%20%3D%5Cfrac%7Bx%7D%7B50%7D)
We begin solving by cross multiplying numerator to denominator of each fraction.
![120(50)=100(x)\\6000=100x\\\frac{6000}{100}=\frac{100x}{100} \\60=x](https://tex.z-dn.net/?f=120%2850%29%3D100%28x%29%5C%5C6000%3D100x%5C%5C%5Cfrac%7B6000%7D%7B100%7D%3D%5Cfrac%7B100x%7D%7B100%7D%20%20%5C%5C60%3Dx)
Answer:
2.5
Step-by-step explanation:
its just 4 x x so you just times 2.5 by 4