ACT Math Practice

Front

What is the sine of an angle in a right triangle?

Back

The sine of an angle A in a right triangle is the ratio of the length of the opposite side to the length of the hypotenuse.

Front

If a circle has a circumference of 16π feet, what is the formula to find the radius?

Back

The radius r can be found using the formula C = 2πr, where C is the circumference.

Front

How do you calculate the final price after a discount and sales tax?

Back

Final Price = (Original Price - Discount) + Sales Tax on Discounted Price.

Front

What is the relationship between the length and width of a box if the length is 3 inches less than twice the width?

Back

The relationship can be expressed as l = 2w - 3, where l is the length and w is the width.

Front

If sales for a business were 3 million dollars more the second year than the first, how can you express the sales of the first year?

Back

Let x be the sales of the first year. Then, sales for the second year = x + 3 million.

Front

What is the formula for the circumference of a circle?

Back

C = 2πr, where C is the circumference and r is the radius.

Front

How do you find the sine of an angle using a right triangle?

Back

Sine(A) = Opposite Side / Hypotenuse.

Front

What is the formula to calculate the area of a triangle?

Back

Area = 1/2 * base * height.

Front

How do you convert a percentage discount into a decimal for calculations?

Back

To convert a percentage to a decimal, divide by 100 (e.g., 30% = 0.30).

Front

What is the formula for calculating the sales tax on an item?

Back

Sales Tax = Price of Item * Sales Tax Rate.