Pb is a line segment on a number line. it has endpoints at -2 and 12. what is the coordinate of its midpoint?

How long does it take hair to grow 8 inches?

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

Ageologist is working in an area with exposed sedimentary rocks and finds a well exposed sequence of stratified rocks. as he works through a thick sequence of limestone, he sees abundant large clam fossils that produce an interlocking texture suggesting a reef, but within the limestone section these clams disappear and the overlying limestone is made up primarily of fragments of corals. he now moves 50 km away and finds limestones interbedded with shales, and the limestones contain the same clam fossils he had seen previously 50 km away. as he continues through this section, the rocks become entirely limestone, and the clams disappear again with coral fossils above forming a reef structure. he concludes