Express 12.383838 in p/q form

How many sides does a regular polygon have if each exterior angle measures 72a.3b.4c.5d.6

If the measure of xyz is 81 what is the measure of yz

The brain volumes (cm cubed) of 50 brains vary from a low of 904 cm cubed to a high of 1488 cm cubed. use the range rule of thumb to estimate the standard deviation s and compare the result to the exact standard deviation of 175.5 cm cubed, assuming the estimate is accurate if it is within 15 cm cubed