Abby and john went to buy fruit john brought 3/4 of a pound of grapes abby brought for a 1/4 ounce of oranges how many pounds of fruit did they buy in total

What is the greatest number of parts of a circle that can be formed by cutting the circle with 7 straight cuts? (note: the parts do not have to be equal in size)

The anwser cause i do not understand just plez

You are standing next to a really big circular lake. you want to measure the diameter of the lake, but you don't want to have to swim across with a measuring tape! you decide to walk around the perimeter of the lake and measure its circumference, and find that it's 400\pi\text{ m}400? m. what is the diameter dd of the lake?