Daria walked 1 2/5 miles this morning and 2 3/10 miles this afternoon how many miles did Daria walked in all

Select all the correct answers. what is 221,000,000,000,000,000,000 expressed in scientific notation?

Abox contains 1 plain pencil and 4 pens. a second box contains 5 color pencils and 5 crayons. one item from each box is chosen at random. what is the probability that a plain pencil from the first box and a color pencil from the second box are selected? write your answer as a fraction in simplest form.

Find the quotient with the restriction.