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# Workbook - PowerPoint PPT Presentation

Workbook . pg. 231 #1-22 (skip 15 &19). Monday October 8. Daily Check: Chords. Daily Check. 1. 2. 3. 4. EOCT Practice. Describe the extrema of the quadratic y = -2(x – 3) 2 + 2 Maximum at (-3, 2) Minimum at (-3, 2) Minimum at (3, 2) Maximum at (3, 2). D. Surface Area

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## Workbook

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Presentation Transcript
Workbook

pg. 231

#1-22

(skip 15 &19)

### Monday October 8

Daily Check:

Chords

Daily Check

1.

2.

3.

4.

EOCT Practice

• Describe the extrema of the quadratic y = -2(x – 3)2 + 2
• Maximum at (-3, 2)
• Minimum at (-3, 2)
• Minimum at (3, 2)
• Maximum at (3, 2)

D

Surface Area

& Volume

of Spheres

HEMISPHERE: HALF A SPHERE

r

Think of the globe!

The equator cuts the earth into the northern and southern hemisphere.

(round to the nearest hundredths)

10 cm

The circumference of a great circle of a sphere is 25 inches. Find the approximate surface area & volume of the sphere. (Round to the nearest tenths.)

25 in

SA and Volume of a Sphere

A spherical balloon has a surface area of 16 in.2 Find the volume of the sphere.

10 in

5 in

Workbook

Pg. 249-251

#6-8, 16-18,

20-22, 26-29

Comparing

Two Spheres

Surface Area & Volume of a Sphere

A spherical balloon has an initial radius of 5 in. When more air is added, the radius becomes 10 in. Explain how S.A. and Volume change as the radius changes.

10 in

5 in

x 2/3

x (2/3)2

x (2/3)3

Volume of a Sphere

A sphere has an initial volume of 400 cm.3 The sphere is made bigger by making the radius 4 times as big. What is the new volume of the sphere?

10 in

5 in

Workbook

Page 251 #30-33

Textbook

Page 239 #1-18