The number 2021 = 43 · 47 is composite. Prove that if we insert any number of digits “8” between 20 and 21 then the number remains composite.

well there are two answers for that.

1: you need 120 ones then that will equal up to 120.

2: you could also do one 100 and 2 tens.

those are the answers that i have thought of.

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step-by-step explanation:

i'm assuming that it's c.)   volcanoes built the mountains and earthquakes tore them down.