Answer:
Step-by-step explanation:
you just gotta add all the side-lengths together and consider each grid square as 10 instead of 1.
so 70 + 40 + 20 + 60 + 20 + 40 i believe.
this all equals 250.
ask your teacher if its a type, because there's no 250 on there. grab a calculator or something as proof.
<span>Which of the following equals 140 to nearest 10
A.134
B.145
C.136
D.146</span>

Rounding to nearest thousand gives 76,000 mg of chlorine