A house is valued at $120,000 and increases in value by 5% each year, The value, y, of the house after x years
is defined by y(x) = 120,000 (1.05)^x.
What is the approximate value of the house after 15 years?

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