What power if 10 do i have to multiply ti make 1.9 a whole number

Four congruent circular holes with a diameter of 2 in. were punches out of a piece of paper. what is the area of the paper that is left ? use 3.14 for pi

If there is 20 dogs in the shelter and 5 dogs get homes, and then 43 more dogs come. how many dogs are there in the shelter?

Explain how you could use the interactive table to tell if sets of points are on the same line. math 8