Math 8: Ch. 1-4, 6 Review

Front

Approximate -√23 to the nearest tenth.

Back

≈ -4.8

Front

Calculate the total amount Zach needs to repay after borrowing $2,000 for 6 months at a 12% annual simple interest rate.

Back

$2,120

Front

Simplify -4n² ÷ (10)² for n = -5.

Back

-20

Front

If Kelsey earns a 12% commission and makes $2704.80, how much were her total sales?

Back

$22,540

Front

Write in scientific notation: 1×10⁻⁵ ÷ 2×10⁻².

Back

5 ×10⁻⁴

Front

Define simple interest and provide the formula used to calculate it.

Back

Simple interest is calculated using the formula I = PRT, where I is interest, P is principal, R is rate, and T is time.

Front

What is scientific notation and why is it used?

Back

Scientific notation is a way to express very large or very small numbers in the form a × 10^n, where 1 ≤ a < 10 and n is an integer.

Front

Explain how to simplify a fraction with exponents.

Back

To simplify a fraction with exponents, subtract the exponent in the denominator from the exponent in the numerator.

Front

What is the process to approximate square roots?

Back

To approximate square roots, find two perfect squares between which the number lies and estimate the value.

Front

Define commission in a sales context.

Back

Commission is a fee paid to an employee based on the sales they generate, usually expressed as a percentage.