The first 4 terms of a 10-term geometric series are listed below. Which expression represents the sum of the series?

+3+ 4+10+ ... +210

16

16

25

16

25

1-60

16

25

16

25

Find the number of positive three-digit even integers whose digits are among 9, 8, 7,5, 3, and 1.

Pls if a cow has a mass of 9×10^2 kilograms, and a blue whale has a mass of 1.8×10^5 kilograms, which of these statements is true?

The figures below are made out of circles, semicircles, quarter circles, and a square. find the area and the perimeter of each figure and give your answers as a completely simplified exact value in terms of π (no approximations).