Easy Dinner Rolls

package (1/4 oz.) active dry yeast 1/2 cup warm water (105° F to 115° F) 1/4 cup butter, melted 1/4 cup granulated sugar 2 large eggs 1/2 teaspoon salt 1 teaspoon olive oil 2 to 2 1/2 cups all-purpose flour Additional melted butter, optional