Question

Estimate the quantity in terms of powers of ten:
2^90

Answer 1

10^27

Answer 2

2^90 = 2^(9x10) = (2^9)^10=512^10

Answer 3

1.23*10^27

Answer 4

2^10 is about 10^3
2^20 is about 10^6
2^30 is about 10^9
...
2^90 is about 10^27