Find the circumference and area of a circle of radius 4.2cm. plz help me today is a due date.

The circumference of the circle is 26.4 cm

The area of the circle is 55.44 cm²

Step-by-step explanation:

The circumference of the circle C = 2πr

The area of the circle A = πr²

r is the radius of the circle

∵ r = 4.2 cm

→ Substitute it in the first rule to find the circumference

∵ C = 2πr

∵ π =

∴ C = 2 ×   × 4.2

∴ C = 26.4 cm

∴ The circumference of the circle is 26.4 cm

∵ A = πr²

∵ r = 4.2 cm

∵ π =

→ Substitute them in the second rule to find the area

∵ A = × (4.2)²

∴ A = 55.44 cm²

∴ The area of the circle is 55.44 cm²

5   1/4   miles per hour

step-by-step explanation:

15   3/4 / 3 = 5   1/4