a box of snacks contained 20 individual packages the newly designed box contains 28 individual packages by what % did the # of individual packages increase​

How do you multiply a mixed fraction by a regular fraction

Monica build a remote control toy airplane for science project to test the plane she launched it from the top of a building the plane travel a horizontal distance of 50 feet before landing on the ground a quadratic function which models the height of the plane in feet relative to the ground at a horizontal distance of x feet from the building is shown

What numbers are included in the set of integers? what numbers are not included?