PLEASE I NEED HELP ASAP I will give brianliest if you have explanation and workings!!

6.85

Step-by-step explanation:

a^2+3.4^2=7.65^2

a^2=46.96

a=6.85

I used Pythagorean theorem, I hope I am right

whatever you can spend with $11.53 or under.

step-by-step explanation:

20 - 8.47 = 11.53. take away the money he used for lunch from the starting amount of 20.

isaiah walks 3 miles due north, turns and then 5 miles due east. how far is he from his starting point?

a^2 + b^2 = c^2

let c = distance from starting point.

(3)^2 + (5)^2 = c^2

9 + 25 = c^2

34 = c^2

sqrt{34} = sqrt{c^2}

sqrt{34} = c