Over Chapter 9 A.A B.B C.C D.D 5-Minute Check 1 A.10a 2 b 3 B.5 2 a 2 b 3 C.10ab 5 D.5ab 5 Write 5...

Over Chapter 9

A. A

B. B

C. C

D. D A B C D

0% 0%0%0%

A. 10a2b3

B. 52a2b3

C. 10ab5

D. 5ab5

Write 5 ● 5 ● a ● a ● b ● b ● b using exponents.

http://glencoe.mcgraw-hill.com/sites/0078885159/

You have already evaluated expressions containing squares of numbers. (Previous Course – Area of Squares!)

• Find square roots.

• Estimate square roots.

• perfect square

• square root

• radical sign

Rational number whose square root is a whole number (you get no decimal places).

One of two equal factors of a number.

The symbol √ used to indicate a nonnegative square root

http://www.glencoe.com/apps/eGlossary612/grade.php

Find Square Roots

Answer: 8

A.

Find Square Roots

Answer: –11

B.

Find Square Roots

Answer: +16 and –16

Find Square Roots

Answer: There is no square root because no number times itself is equal to –9.

D.

A. A

B. B

C. C

D. D

A. 624

B. 12.5

C. 5

D. –5

A.

A. A

B. B

C. C

D. D

A. 12

B. –12

C. –72

D. –20,736

B.

A. A

B. B

C. C

D. D

A. 4

B. –4

C. 4 and –4

D. 256 and –256

C.

A. A

B. B

C. C

D. D

A. –8

B. 8

C. –32

D. There is no real square root.

D.

Estimate Square Roots

Answer: 5

A.

The first perfect square less than 22 is 16.

The first perfect square greater than 22 is 25.

B.

Estimate Square Roots

Answer: –18

The first perfect square less than 319 is 289.

The first perfect square greater than 319 is 324.

A. A

B. B

C. C

D. D

A. 6

B. 7

C. 8

D. 9

A.

A. A

B. B

C. C

D. D

A. –6

B. –7

C. 6

D. 7

B.

Use a Calculator to Estimate a Square Root

Use a calculator.

Round to the nearest tenth.

Check for Reasonableness Since 82 = 64, the answer is reasonable.

ENTER2nd 57 7.549834435

Use a Calculator to Estimate a Negative Square Root

Use a calculator.

Round to the nearest tenth.

Check for Reasonableness Since 72 = 49, the answer is reasonable.

ENTER2nd 42 6.480740698

A. A

B. B

C. C

D. D

A. 3.9

B. 9.8

C. 38.5

A. A

B. B

C. C

D. D

A. –8.5

B. –36.0

C. 8.5

Use Square Roots to Solve Problems

SKYSCRAPER The tallest building in Houston, Texas, is the JP Morgan Chase Tower, standing at 1002 feet. About how far to the horizon can a person standing on the top floor see? Round your answer to the nearest tenth.

Replace h with 1002.

Evaluate the square root first.

Write the formula.

Use Square Roots to Solve Problems

≈ 38.6 Multiply.

Answer: On a clear day, a person could see about 38.6 miles.

A. A

B. B

C. C

D. D

A. 23.2 miles

B. 23.3 miles

C. 23.7 miles

D. 24.4 miles

Over Chapter 9 A.A B.B C.C D.D 5-Minute Check 1 A.10a 2 b 3 B.5 2 a 2 b 3 C.10ab 5 D.5ab 5 Write 5...

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