The Kelvin scale is an absolute temperature scale that can be used to calculate percent change in temperatures. The formula to convert Celsius to Kelvin is KC 273.15.=+ What is the percent change if the temperature rises from 21°C to 29°C? Round to the nearest tenth.

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?

Use circumcenter theorem to solve for the given values

Which fraction represents the ratio 35 : 42 in simplest form