Can someone please help me with these?

If i have a 24 in loaf of bread and i cut it into two pieces one 9 in how long was the other

Maria walks a round trip of 0.75 mile to school every day. how many miles will she walk in 4.5 days

Frank has a devised a formula for his catering business that calculates the number of meatballs he needs to prepare. the formula is m=4a+2c, where c=number of children; m=number of meatballs; a=number of adults. how many meatballs are required for a party of 10 adults and 5 children?