I have no idea pls help

Q1. Radius = 3 cm

Diameter = 6 cm

Circumference = 18.84 cm

Area = 28.26 cm²

Step-by-step explanation:

Hello! Let us solve Q.1 together and you can solve Q2 and 3 by how we did in Q1. First, you will need to know what diameter, radius, and circumference means.

Definitions:

Diameter - It is a line that passes through the center of the circle and the line's end (known as endpoints) touches the opposite to each other (basically there are two endpoints).

Radius - It is a line which is half of the diameter.

Circumference - It is the circle.

Now that we know the definitions, let us solve it.

Q1. Radius = 3 cm

Diameter = 6 cm

Circumference = 18.84 cm

Area = 28.26 cm²

Looking at the circle, we are already given the radius which is 3 cm. Now let us find the diameter. We know that the radius is half of the diameter, so we would multiply the radius (3 cm) by 2.

3 × 2 = 6 cm ---> diameter

Lastly let us find the circumference. If you look above the questions, you are given an example and gives you the formula of circumference. We will use that formula to find the circumference of Q1. circle.

Circumference formula:-

C = 3.14 × 6

C = 18.84 cm

Same goes with finding the area. You are already given the formula, so you will use it to find the area of Q1.

Area of circle formula:-

a = 3.14 × 3²

a = 3.14 × 9

a = 28.26 cm²

Hope this helps and if you need help I would be glad to help you, thank you :) !!

75

step-by-step explanation:

answer: .64

step-by-step explanation

set up the formula for standard deviation for this set of numbers, then simplify