Question

Which expression represents the largest number?

A. 40.1 3 1026
B. 4.1 3 1027
C. 0.411 3 1026
D. 0.04001 3 1025

Answer 1

I don't see any expressions; just sets of three numbers.

Ahhh. If you mean

40.1 * 10^26
4.1 * 10^27
0.411 * 10^26
0.04001 * 10^25

then convet them all to 10^25 and you have

401 * 10^25
410 * 10^25
4.1 * 10^25
0.04001 * 10^25

Now it should be clear.