Libby needs to make 1/2 of her chili for the school's chili contest. If Libby usually needs 1/2 a cup of corn for her chili recipe, how much corn will she need for the chili contest? Write a division equation and multiplication equation to show this.

Rachel is studying the population of a particular bird species in a national park. she observes every 10th bird of that species that she can find in the park. her conclusion is that the birds living in the park who belong to that species generally feed on insects. rachel's sample is . based on the sample she picked, rachel's generalization is