Chapter 4 TEST Flashcardizz

Front

What is a unit rate?

Back

A unit rate is a comparison of two different quantities where one of the quantities is expressed as a quantity of one. For example, if a car travels 60 miles in 1 hour, the unit rate is 60 miles per hour.

Front

How do you find the equation of a line given a unit rate?

Back

The equation of a line can be expressed in the form y = mx, where m is the unit rate. For example, if the unit rate is 60 miles per hour, the equation is y = 60x.

Front

What is the formula for the area of a circle?

Back

The area A of a circle is calculated using the formula A = πr², where r is the radius of the circle.

Front

What is the value of π (pi)?

Back

π (pi) is approximately equal to 3.14 or 22/7.

Front

How do you calculate the circumference of a circle?

Back

The circumference C of a circle is calculated using the formula C = 2πr, where r is the radius.

Front

If a circle has a radius of 5 inches, what is its area?

Back

Using the formula A = πr², the area is A = π(5)² = 25π, which is approximately 78.54 square inches.

Front

If a circle has a diameter of 10 inches, what is its circumference?

Back

Using the formula C = πd, where d is the diameter, the circumference is C = π(10) = 10π, which is approximately 31.42 inches.

Front

What is the relationship between diameter and radius?

Back

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

Front

How do you convert a fraction to a unit rate?

Back

To convert a fraction to a unit rate, divide the numerator by the denominator to find the value per one unit. For example, 3/4 can be expressed as 0.75 per 1.

Front

What is the unit rate of 300 miles every 5 hours?

Back

The unit rate is 60 miles per hour, calculated by dividing 300 miles by 5 hours.