Ill do all of your hw (math) for money but only if I understand how to and the cost will vary

At a lunchron, guests are offered a selection of five different grilled vegetables and four different meats. in how many waya could one choose three vegetables and two meats?

Do,h = (7, 9) (14, 18) the scale factor is

If a flying disk is 139 meters in the air and travels at an average of 13 m/s how long is it in the air