Harper bought a 35-pound bag of birdseed. She filled some bird feeders with the seed. How can Harper find out how much birdseed she used?

Use a tape measure to find the height of the seed left in the bag, and then subtract the number of inches from 35.

Use pint containers to measure the volume of the seed left in the bag, and then subtract the number of pints from 35.

Use a scale to weigh the amount of seed left in the bag, and then subtract the number of pounds from 35.