The common ratio of a geometric series is 1/4 and the sum of the first 4 terms is 170. what is the first term of the series?

Steve is scuba diving near his home in maui. at one point he is 100 feet below the surface. represent this number with a negative number. if he descends another 5 feet, what negative number will represents his.

There are 15 plates and each plate is either 7 or 12 inches diameter. which systems of equations do you use to find the number of 7 inch plates, x and 12 inch plates, y

The volume of a sphere is increased by 6%. calculate the corresponding percentage increased in it area.