Understanding Variables, Expressions, and Algebraic Concepts

What does SPF stand for in the context of sun protection?

• Sun Protection Factor

• Sunlight Prevention Factor

• Sunburn Prevention Formula

• Skin Protection Formula

If you can stay in the sun for 10 minutes without sunscreen, how long can you stay with SPF 5?

• 10 minutes

• 15 minutes

• 50 minutes

• 30 minutes

What is a numerical expression?

• A sentence describing a math problem

• A letter representing a number

• A combination of numbers and operations

• A single number

Which of the following is an algebraic expression?

• 10 / 2

• 7 * 8

• x - 2

• 5 + 3

What is the product of 7 and s divided by the product of 8 and y?

• (7s) / (8y)

• 7 + s / 8 + y

• 7s * 8y

• 7 / s + 8 / y

How would you express 'five greater than half of a number t' algebraically?

• 5/t + 2

• t + 5/2

• 5t/2

• t/2 + 5

What does the exponent in a power expression indicate?

• The number of times the base is multiplied by itself

• The number of times the base is added to itself

• The number of times the base is subtracted from itself

• The number of times the base is divided by itself

What is 3 to the fourth power?

• 12

• 27

• 81

• 64

How do you read 5^3?

• Five to the second power

• Five to the fourth power

• Five cubed

• Five squared

What is the base in the expression x^n?

• x

• n

• x^n

• None of the above