Answer:
21
first we begin from 1 to 100 we find 11 numbers contain 1 then we count 1s from 10 to 19 we get 9 numbers but there is an exciption in number 11 as it cotains 2 1s so thenumber of 1s is 21
Answer:
b
Step-by-step explanation:
I did that
Answer:
the area is 1800
Step-by-step explanation:
ik this doesn't answer the full question but hope it helps <3
Think it’s A just because it’s actually decaying rather than being from decayed to up like B, C, and D( I don’t know how to explain it, sorry) I’m not sure however !
