Question

and your 13 is scientist will put tree wrap around the tree one to protect it from the winter snow. the height of the tree route needs to be 45 in the rap is price by the square foot to the nearest square feet how many square feet does she need

Answer 1

`LA = 2\pi (22.2/2)in 45 in = 3138.451 in^2`

`3138.451 in^2 *(1 ft^2)/(144 in^2)=21.79 ft^2 \approx 22 ft^2`

Explanation:

Assuming the data from the picture attached. And the following optios:

A. 22

Correct. We assume that the lateral surface area of a cylinder is a rectangle, where the base of the rectangle equals the circumference of the cylinder and the height of the rectangle equals the height of the cylinder.

We need to subtract the area of the two circular bases from the formula for the surface area of a cylinder.

The lateral area of a cylinder is given by:

`LA = 2\pi rh`

In the table for Tree 1, the diameter in year 13 is 22.2 inches.

`LA = 2\pi (22.2/2)in 45 in = 3138.451 in^2`

And now we can convert to ft^2 like this:

`3138.451 in^2 *(1 ft^2)/(144 in^2)=21.79 ft^2 \approx 22 ft^2`

B. 44

False the correct option is A

C. 121

False the correct option is A

D. 261

False the correct option is A