5 friends each ate 1 slice of pizza. There were 8 slices in the whole pizza. What fraction of the pizza was left over?

For how answer my question this will be the last question can you answer in math subject

Ageologist had two rocks on a scale that weighed 4.6 kilograms together.rock a was 0.5 of the total weight.how much did rock a weigh?

Rena is building a 1: 180 scale model of a real castle. her model has a rectangular base that is 3 feet wide and 4 feet long what is the area of the base of the actual castle in square feet