Answer :
c = 10 radical 2
Step-by-step explanation:
10^2 + 10^2 = c^2
100 + 100 = c^2
200 = c^2
ANSWER: The length of the entire dash is 700 meters.
EXPLANATION:
Because 20% of the dash equals 140 meters, we can use a variable to figure out the length of the entire dash.
Let x be the length of the entire dash.

The length of the entire dash is 700 meters.
(5,7) (5,4) (7,4) hope that helps
You need 7 cartons, 4•7=28 so you’ll be sure to have enough:)