Answer:
each floor is 13 feet tall
Step-by-step explanation:
1326/102 = 13 feet
She can use 68 + 20 = 88 to help by noticing that the 20 is ahead of 19 by 1. She can easily mentally turn the 20 into a 19 and realized that the 88 would become 87.
Answer:
The volume of the prism is 
Step-by-step explanation:
First let's get the area of the triangle. To get that, we use the formula 
In words, this is <em>base · height ÷ 2</em>
When we plug in the numbers, it is 10 · 10 ÷ 2, which is equal to 50.
And of course we multiply 50 by 25 to find 