A type of marble has a density of 2.5 grams/marble. A box filled with marbles has a total mass of 300 grams determine the number of marbles in the box if the empty box has a mass of 50 grams. Pls help

100

Explanation:

Step 1: Subtract 50 by 300 to find the total mass of the marbles

300 - 50 = 250

Not hard, right?

Step 2: Divide 250 by 2.5

250 ÷ 2.5 = 100

And... 100 is your answer :)

Hope this helps :)

-jp524