The mean “room and board” of a four year college is $9126. The standard deviation is $1500. You randomly select 9 four year colleges
Find
A) the mean
B) standard deviation
c)what is the probability that the mean “room and board” is less than $9400 (assume it is normally distributed)

Colby and jaquan are growing bacteria in an experiment in a laboratory. colby starts with 50 bacteria in his culture and the number of bacteria doubles every 2 hours. jaquan starts with 80 of a different type of bacteria that doubles every 3 hours. let x equal number of days. colbys experiment follows the model: a.) y=50*2^x b.) y=50*2^8x c.) y=50*2^12x jaquans experiment follows the model: a.)80*2^x b.)80*2^8x c.)80*2^12x

Add the fractions, and simply the result to lowest terms. 2/3 + 2/7= ?

Aregular hexagon has sides of 2 feet. what is the area of the hexagon? 12 ft2 12 ft2 24 ft2 6 ft2