MATH FD

Front

What is the circumference of a circle with a diameter of 20 inches?

Back

Circumference = π × diameter = π × 20 in ≈ 62.8 in.

Front

How do you calculate the circumference of a circular swimming pool with a diameter of 21 feet?

Back

Circumference = π × diameter = π × 21 ft ≈ 65.94 ft.

Front

What is the formula to find the mean distance between two points in scientific notation?

Back

Mean distance = (Distance from point A + Distance from point B) / 2.

Front

What is the difference in mean distances from the sun between Earth and Jupiter?

Back

Difference = Jupiter's distance - Earth's distance = 4.8388 x 10^8 miles - 9.29 x 10^7 miles = 3.9098 x 10^8 miles.

Front

How do you solve the system of equations: 7x + 4y = 12 and x + 2y = -4?

Back

Using substitution or elimination, the solution is (4, -4).

Front

What is the distributive property in algebra?

Back

The distributive property states that a(b + c) = ab + ac.

Front

How do you multiply two binomials, such as (2x + 3)(3x + 4)?

Back

Use the distributive property: (2x)(3x) + (2x)(4) + (3)(3x) + (3)(4) = 6x^2 + 17x + 12.

Front

What is the formula for the area of a circle?

Back

Area = π × radius².

Front

How do you convert a diameter to a radius?

Back

Radius = Diameter / 2.

Front

What is the relationship between diameter and circumference?

Back

Circumference = π × diameter.