Someone help! I can´t do this!

Afurniture store has 1,500 chairs in storage. a manager uses three delivery receipts to simulate samples to check 100 chairs and note the number of brown chairs. suppose the actual number of brown chairs is 1,080. about how many brown chairs are

Which of the following three dimensional figures has a circle as it’s base

Find the distance between the point (-3,-4), and (see the picture below)