8th grade Math STAAR Review

Front

What is the formula for the volume of a sphere?

Back

V = (4/3)πr³, where r is the radius.

Front

How do you round a number to the nearest tenth?

Back

Look at the hundredths place; if it's 5 or more, round up.

Front

What is the volume of a sphere with a radius of 10?

Back

V = (4/3)π(10)³ ≈ 4188.8.

Front

What is the formula for the volume of a cone?

Back

V = (1/3)πr²h, where r is the radius and h is the height.

Front

How do you solve for x in the equation 45,000 + 2,500x = 54,000 + 1,500x?

Back

Combine like terms: 2,500x - 1,500x = 54,000 - 45,000.

Front

What is the solution to the equation 45,000 + 2,500x = 54,000 + 1,500x?

Back

x = 0.5.

Front

What is the distance formula in a right triangle?

Back

d = √(x² + y²), where x and y are the lengths of the legs.

Front

If a pole is 32.5 feet tall, what is the height of the pole?

Back

The height of the pole is 32.5 feet.

Front

How do you calculate earnings based on hours worked?

Back

Earnings = Hourly Rate × Hours Worked.

Front

If Joe worked 30 hours at $20 per hour, how much did he earn?

Back

Earnings = 20 × 30 = $600.