Measurements, Calculations, and Dimensional

I don’t know how to handle this Chemistry question and need guidance.

Question 1

Please convert 0.00425 to scientific notation. Remember to use “*10^#” in your answer.

Question 4

How many significant figures are in the measurement 1.050?

Group of answer choices

4

5

3

2

2

Question 5

How many significant figures are in 0.01205g?

Group of answer choices

3

6

4

none of the above

2

Question 7

Please calculate the following and record your answer to the correct number of significant figures:

23.7 x 3.8 = ?