Question

HELP ASAP

1.The total mass of 500 crayons is 1 kilogram. What is the mass of each crayon in grams?

2.John spends 1 hour making birthday cards. If each birthday card takes 3 minutes to make, how many birthday cards can John make?

Answer 1

1. Each crayon weights 2 grams.

2. John can make 20 birthday cards in 1 hour.

Explanation:

1. First we need to convert Kilograms into grams, to do this, we must multiply the # of Kgs by 1000. Then we need to solve for the mass of the crayon.

`500c=1\\\\500c=1000\\\\c=(1000)/(500) \\\\c=2`

Each crayon weights 2 grams.

2. First we need to convert 1 hour into minutes. As there are 60 minutes in an hour, we must multiply the number of hours by 60 to find the minutes. Then we can solve for the number of birthday cards.

`3c=1\\\\3c=60\\\\c=(60)/(3) \\\\c=20`

John can make 20 birthday cards in 1 hour.