Evaluating Exponents and Changes

This video tutorial covers Unit 7, Lesson 5, focusing on using negative numbers to understand various contexts. It includes exercises on representing temperature changes with positive and negative numbers, identifying positive and negative quantities, and understanding changes in different situations. The tutorial also explains how to label points on a number line and evaluate mathematical expressions involving powers.

If Tuesday's temperature is 4 degrees less than Monday's, how would you represent this change?

• -3.5

• +3.5

• -4

• +4

Which of the following represents a positive change?

• Leaking 2 gallons of water

• Gaining 5 pounds

• Descending 550 feet

• Losing 5 pounds

What does a negative change in temperature indicate?

• Temperature decrease

• Temperature increase

• Temperature remains constant

• No change in temperature

On a number line, what is the opposite of +4?

• -5

• +5

• -4

• +4

How far is -5/2 from zero on a number line?

• 1 unit

• 10 units

• 5 units

• 2.5 units

What is the result of 2^3 * 3?

• 12

• 6

• 8

• 24

How do you evaluate 4^2 / 2?

• 8

• 16

• 2

• 4

What is 3 to the power of 1?

• 1

• 0

• 9

• 3

Calculate 6^2 divided by 4.

• 36

• 6

• 12

• 9

What is the sum of 10^2 and 5^2?

• 225

• 150

• 125

• 100