Answer:
13
Step-by-step explanation:
Given:
- Square stickers that were 3/4 in long
- The spine is 10 and 1/2 in long
If she laid the stickers side by side without gaps or overlaps so the number of sticker to cover the length of the spine:

10 :
≈13
She needs 13 stickers cover the length of the spine
First you have to find the missing y
Answer:
The angle being shown is an acute angle
Step-by-step explanation:
4πr2
= 4×π×42
= 64π
= 201.06192982975 inches2
The answer should be the last one