What is the geometric mean of 40 and 15?

Which of the binomials below is a factor of this trinominal? x^2-13+30

According to modern science, earth is about 4.5 billion years old and written human history extends back about 10,000 years. suppose the entire history of earth is represented with a 10-meter-long timeline, with the birth of earth on one end and today at the other end.

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base