1. 105,000,000 written in scientific notation would be:

a. 1.05 x 108
b. 10.5 x 108
c. 1.05 x 10-8
d. 10.5 x 107
2. 45,000 in scientific notation would be:

a. 4.5 x 104
b. 4.5 x 10-4
c. 45 x 103
d. 45 x 10-3
3. 7,600,000 in scientific notation would be:

a. 7.6 x 108
b. 7.6 x 10-6
c. 7.6 x 106
d. 76 x 105
4. 0.000000057 in scientific notation would be:

a. 0.57 x 10-7
b. 5.7 x 10-8
c. 5.7 x 108
d. 57 x 109
5. 0.000036 in scientific notation would be:

a. 3.6 x 10-5
b. 36 x 10-6
c. 3.6 x 105
d. 36 x 106