Area squares is the side*side, or



So, each side equals 5.
Its 8.7 because 1 is lower than 6 so you add 7.
Answer:

Step-by-step explanation:
We want to find the sum of all even numbers from 0 to 175.
The series will be:

The explicit formula for this is
, where
.
We need to find how many terms are there.


The sum of terms is given by:

Substitute n=88,
and l=174 to get:

Answer:
60 stamps
Step-by-step explanation:
Has 33 now. Before adding 13 stamps, she had (33-13) 30. This is half of her total, since she already sold half. To get the whole, multiply 30 by 2. 60 She started with 60