Question

4. Nguyen is decorating the room for her sister's baby shower party. She is wrapping

Answer 1

Answer:

Step-by-step explanation:

Given the information of the conical hat

• diameter of 16 inches => Radius = 8 inches
• height of 9 inches

=> the slant height of the hat is (use Pythagorean Theorem)

$s^{2}$ = $r^{2} + h^{2}$

<=> $s^{2}$ = $8^{2} + 9^{2}$

<=> s = $\sqrt{145}$  

The area (without the base area) of tissue paper will she need to make one hat is:

SA = πrs  in2

<=> SA =  π*8*$\sqrt{145}$  in2

<=> SA =8 $\sqrt{145}$ π

=> the total tissue paper will she need for 21 hats is:

SA*21

= 8 $\sqrt{145}$ π*21

= 6352,18 in 2