body{margin:0;} noscript{z-index: 10000; position: fixed; display: block; height: 100%; width: 100%; background: #fff;} noscript .fa{font-size: 40px; display:block; color: #daa520;} noscript div{margin-top: 6%; padding-left: 20px; padding-right: 20px; text-align: center;} ! You must have JavaScript enabled to use this site.

McGraw Hill Integrated II, 2012

MH

McGraw Hill Integrated II, 2012 View details

4. Simulations

Continue to next subchapter

Exercise 32 Page 914

The surface area of a sphere is four times the product of π and the square of the radius.

1 017.9in.^2

Practice makes perfect

Consider the given sphere.

The surface area of a sphere is four times the product of π and the square of the radius. S.A.=4π r^2 In the diagram, we can see that the radius is 9 inches. We can substitute this value for r in the above formula, and simplify the right-hand side.

S.A.=4π r^2

r= 9

S.A.=4π ( 9)^2

▼

Simplify right-hand side

Calculate power

S.A.=4π (81)

CommutativePropMult

Commutative Property of Multiplication

S.A.=4(81)π

Multiply

S.A.=324π

Use a calculator

S.A.=1017.876020...

Round to 1 decimal place(s)

S.A.≈ 1017.9

The surface area of the given sphere rounded to the nearest tenth is 1017.9 square inches.

Subchapter links

Exercises p.911-914