Materials of equal value for trading - 1 stone = 4 logs - 1 brick = 10 logs - 2 logs = 150 nails it takes 39 stones and 165 logs to build 3 sheds. what is the exact number of stones needed to build 5 sheds?

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.

Drag the tiles to the correct boxes to complete the pairs. not all tiles will be used. match each division expression with the correct quotient.

Agrasshopper weighs 0.89 grams. express the grasshopper’s weight in scientific notation.