The lava cooled in a wide range of shapes one of which is a rectangular prism. Columns of these promisions are found throughout the devil's tower. If these columns have a height of 100m and a base that measures 2m by 2m find the number of towers necessary to form the devil's tower?

Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.1. (round your answers to four decimal places.) (a) if the distribution is normal, what is the probability that the sample mean hardness for a random sample of 8 pins is at least 51?

What is the volume of a cone with a height of 6 cm in the radius of 2 cm

The customer price index(cpi), which measures the cost of a typical package of customer goods, was 208.8 in 2011 and 244.1 in 2016.let x=11 corresponding to the year 2011 an estimate to cpi into 2013 and 2014. assume that the data can be modeled by a straight line and the trend to continue idenfinitely. use data points to find such a line and then estimate the requested quantities