The brain volumes (cm^3) of 20 brains have a mean of 1175.5 cm^3 and a standard deviation of 124.6 cm^3. Use the given standard deviation and the range rule of thumb to identify the limits separating values that are significantly high. For such data, would a brain volume of 1444.7 cm^3 be significantly high?

Sam is a waiter at a local restaurant where he earns wages of $5 per hour sam figures that he also eams about $3 in tips for each person he serves sam works 6 hours on a particular day. if n represents the number of people sam serves that day, which of the following functions could sam use to figure ehis total earings for the do o a. en) = 30 o b. en) = 5n+ 18