Answer:

Step-by-step explanation:
Notice that
is a right triangle where its hypotenuse is
. We can also see that
. For this we must use the Pythagorean Theorem.
Recall:
The Pythagorean Theorem states that if you have a right triangle, the principal square root of the sum of the squares of each leg is the length the hypotenuse.
We can see that
and 

Answer: B) -2.24
Step-by-step explanation:
560 / 7 = 80
<span>Hillary can read 80 words per minute.
</span><span>I hope this helps :)</span>