How many times smaller is 2 * 10^-10 than 4 * 10^-9?

My homework says, write 9 decimals, with decimal places any suggestions on how to work this out. I just joined my school, so I cant figure out all the problems.

The length of rectangle is 56 cm and the width is 46 cm. Find the perimeter and the area of the rectangle

Which two-dimensional views are standard in an orthographic drawing?

The least common denominator of 3/4 and 1/6 is 24. true or false

10*2 tens = ? tens = ?

Stephanie is a goalie on her soccer team, which means she tries to block any shots her opponents take on goal. During a tournament, she blocked 15 shots but allowed 4 goals. For every goal Stephanie allowed, she blocked nearly shots.

Write a meaningful negation for the following statement. The shirt I'm wearing to my interview is orange.

Wayne's total body weight (b) equals 113 pounds. His body weight is roughly 14 times the weight of his head (h). Which equation represents the proportional relationship between Wayne's body weight and weight of his head?

Arrange in decreasing order 8.508 8.58 7.5 7.058

The number of customers in a store on the first day is represented by (6x - 3). The number of customers on the second day is represented by (x - 1). Write an expression to find to how many more customers visited the store on the first day.