10. A calculator displays 4E-6. How do you write 4E-6 in scientific notation? blank * 10
11. Multiply.
（2.5*10^1）（9.2*10^7）
12. Evaluate the expression.
- 8 * 9/(^ - 8-^ - 4)
2.3 * 10 ^ 9
2 * 10 ^ 9
1.8 * 10 ^ 9
8.8 * 10 ^ 9
10. 4E-6 can be written as 4 * 10^-6 in scientific notation.
11. (2.5*10^1) * (9.2*10^7) equals 23 * 10^8.
12. The expression - 8 * 9/(^ - 8-^ - 4) is not clear. Please clarify the exponent and operator being used.