Answer:
21021
Step-by-step explanation:
For this question, we use the Pythagorean theorem.
We know the lengths of the legs, a and b.
Now, let's solve for the hypotenuse, c.
Take the positive square root.
Hope this helps! :)
She wrote a 4 instead of a 3.
There are only 3 numbers that are greater than 7. They are 8, 9, and 10. Mariah must have include 7 in her list. That is how she got 4 instead of 3.