Front

What percent of a circle is shaded if 70% is shaded?

Back

70% of the circle is shaded.

Front

What is the formula for the circumference of a circle?

Back

The circumference (C) of a circle is given by the formula C = 2πr, where r is the radius.

Front

How do you calculate the total cost including tax?

Back

To calculate the total cost including tax, multiply the original price by (1 + tax rate). For example, $59.99 + 7.5% tax = $59.99 * 1.075 = $64.99.

Front

What is the unit price of an item?

Back

The unit price is calculated by dividing the total price by the number of units. For example, $5.12 for 32 ounces gives a unit price of $5.12 / 32 = $0.16 per ounce.

Front

What is the result of the expression -8 + 12 + (-12) + 8?

Back

The result is 0.

Front

What does it mean for a percentage to represent a part of a whole?

Back

A percentage represents a fraction of 100. For example, 70% means 70 out of 100 parts.

Front

How do you convert a fraction to a percentage?

Back

To convert a fraction to a percentage, divide the numerator by the denominator and multiply by 100.

Front

What is the relationship between radius and diameter?

Back

The diameter of a circle is twice the length of the radius. D = 2r.

Front

How do you find the area of a circle?

Back

The area (A) of a circle is calculated using the formula A = πr^2, where r is the radius.

Front

What is tax rate and how is it applied?

Back

The tax rate is a percentage of the purchase price that is added as tax. For example, a 7.5% tax on $100 is $7.50.