2- 2,2930

2.293×10^4 is equal to 22,930.

When you multiply a number by 10 to the power of something, all you must do is move the decimal point that many places. If you multiply by 10^4, you move the decimal point 4 places to the right. (If the power is negative, like 10^-4, you would move the decimal point to the left instead)

By that logic,

303.7×10^-11 is equal to 0.000000003037. (All I did was move the decimal point 11 places to the left)

To write that in scientific notation, you would move the decimal point in 0.000000003037 until the number is greater than or equal to 1 and less than 10. In this case, you would move the decimal point 9 places to make the number 3.037.

Since you moved the decimal 9 places, the correct form would be 3.037 x 10^-9, but I do not see this as one of your options.

Hope that made a little bit of sense!

3.037 x10^ -9 this is the correct answer

2) the answer is 22,930