Example 9 Find the surface area of each figure to the nearest tenth. 24. 8 cm .4 cm 23. 24 mm 6 cm 18 mm

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter1: Variables, Expressions, And Integers
Section1.5: Adding Integers
Problem 45E
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Directions: find the surface area of each figure to the nearest tenth. need help with 23 and 24.
20. MOONS OF SATURN The planet Saturn has several moons, and they can
29.
be modeled accurately by spheres. Saturn's largest moon, Titan, has a
radius of about 2575 kilometers. What is the approximate surface area
of Titan? Round your answer to the nearest tenth.
30.
31.
Example 8
32
21. AMUSEMENT PARK Spaceship Earth at Disney's Epcot Center is a sphere.
If the circumference of Spaceship Earth is C = 7Tx, find the surface area
in terms of x and r.
22. BILLIARDS If the circumference of an eight-ball is C = 4tx, find the surface area in
terms of x and A.
Example 9
Find the surface area of each figure to the nearest tenth.
24.
23.
8 cm
-4 cm
24 mm
6 ст
18 mm
25. THEATER Carlos is building a prop for the school play, and he needs to calculate
the amount of lumber needed to make it. The prop is shaped like a tower and
the radius of the base of the tower is 2,5 feet. If the tower is hollow and has ng
base, what is the approximate surface area of the tower? Round your answer
the nearest tenth.
Transcribed Image Text:20. MOONS OF SATURN The planet Saturn has several moons, and they can 29. be modeled accurately by spheres. Saturn's largest moon, Titan, has a radius of about 2575 kilometers. What is the approximate surface area of Titan? Round your answer to the nearest tenth. 30. 31. Example 8 32 21. AMUSEMENT PARK Spaceship Earth at Disney's Epcot Center is a sphere. If the circumference of Spaceship Earth is C = 7Tx, find the surface area in terms of x and r. 22. BILLIARDS If the circumference of an eight-ball is C = 4tx, find the surface area in terms of x and A. Example 9 Find the surface area of each figure to the nearest tenth. 24. 23. 8 cm -4 cm 24 mm 6 ст 18 mm 25. THEATER Carlos is building a prop for the school play, and he needs to calculate the amount of lumber needed to make it. The prop is shaped like a tower and the radius of the base of the tower is 2,5 feet. If the tower is hollow and has ng base, what is the approximate surface area of the tower? Round your answer the nearest tenth.
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