Question

Linda leaves the school to go home. She walks 7 blocks south and then 9 blocks east. how far is Linda from her office?

A.8 blocks
B.11.5 blocks
C.20 blocks
D.14 blocks

Answer 1

B. 11.5

Explanation:

That missing length can be solved via the equation a^2+b^2=c^2, where the hypotenuse is c. We know A and B, which is 7 and 9.

7^2+9^2=130

sqrt 130 is 11.4017543

Here, you kinda have to break the rules of rounding to say that it is B.

There could be a more efficient route for resolving this answer, but this is the method that I was taught.