How to find the the area of a regular triangle in a circle

What is the perimeter of a triangle 7.25 cm by 7.2 cm by 8 cm

You can buy DVDs at a local store for $15.49 each. You can buy them at an online store for $13.99 each plus $6 for shipping. How many DVDs can you buy for the same amount at the two stores?

Devon has 80 books to pack in boxes. She packs 20 books in each box. How many boxes does she need?

There are 120 planes. 2/3 are parked. 2/5 are jets and 1/8 are ready for take off. What fraction of the total are not jets

Jeremy's car travels 26 miles per gallon of gas (g). If the distance traveled (d) can be given by a function, what is the input of this function?

Nicole has a piece of red ribbon that is 9.91 inches long and a piece of green ribbon that is 1.66 inches long. How much longer is the red ribbon?

Round 534 to the nearest tenth

Two hundred randomly selected people were asked to state their primary source for news about current events: (1) Television, (2) Radio, (3) Internet, or (4) Other.

What times 3 equal 19?

Paula a college student earned $3,600 she spent 2,500 for tuitution 600 for rent and 430 for food the rest went for miscellaneous expenses ehat are the fractions?