If a circle has a diameter of 12 inches, what is the area of the circle?

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

In the sixth grade 13 out of 20 students have a dog if there are 152 sixth grade students how many of them have a dog

Two trains leave stations 546 miles apart at the same time and travel toward each other. one train travels at 95 miles per hour while the other travels at 115 miles per hour l. how long will it take for the two trains to meet