How is multiplying and dividing numbers in scientific notation different from adding and subtracting numbers in scientific notation?

What is the value with a place of tenths in 907.456 1) 0 2) 6 3) 4 4) 5

You're locked out of your house. the only open window is on the second floor, 25 feet above the ground. there are bushes along the edge of the house, so you will need to place the ladder 10 feet from the house. what length ladder do you need to reach the window?

The average length of a king cobra is 3.7 m. the record length is 1.88 m longer than the average. how long is the record holder?