the actual answer would be 7.14 for leg b, but if you round it you will get 7.14 same answer ^^
Step-by-step explanation:
you can use the Pythagorean theorem to find the answer for leg b, you square 7 which will get you 49. then you square 10 which will get you 100. then you subtract 100 - 49 = 51. then you find the square root of = 7.14