What is the value of ?

In the developed world, women are increasingly more likely to delay childbirth until their mid- to late- twenties or long because

If the basis of an isosceles trapezoid have lengths of 11 and 26, what is the length of the median?

Some gamma ray bursts are hypothesized to come from mergers of neutron stars or black holes. if this hypothesis is correct, what else should we in principle be able to detect from such mergers? a. gravitiational waves b. x-ray bursts c. significant disruption of gas thousands of light-years away in the surrounding galaxy d. an "afterglow" of bright visible light, lasting for weeks