Final answer:
Sarah can create 6 emergency backpacks, with each backpack containing 7 first aid kits, 4 batteries, and 8 bottles of water.
Step-by-step explanation:
Sarah is looking to create emergency backpacks with a set number of supplies: 42 first aid kits, 24 batteries, and 48 bottles of water. To determine the largest number of backpacks she can make with an equal amount of each item, we need to find the greatest common divisor (GCD) of the quantities of the items she has. The GCD of 42, 24, and 48 is 6. This means Sarah can create 6 emergency backpacks with an equal distribution of supplies.
Now, let's calculate how much of each item will be in each backpack:
First aid kits: 42 kits / 6 backpacks = 7 first aid kits per backpack
Batteries: 24 batteries / 6 backpacks = 4 batteries per backpack
Bottles of water: 48 bottles / 6 backpacks = 8 bottles of water per backpack
Therefore, each emergency backpack will contain 7 first aid kits, 4 batteries, and 8 bottles of water.