0.001=10^___

1 billion=10^___

1/10 = 10^___

13^5 in standard notation
10^9 in standard notation

please hellp me answer tese questions

Do a little investigation and you'll see the pattern

10^0 = 1
10^-1 = 1/10 = 0.1
10^-2 = 1/100 = 0.01
...

a billion is a thousand million = 10^3 * 10^6 = 10^9

I think you meant 10^5 -- that would be a 1 with 5 zeros = 10000