Number and operations negative and zero exponents​

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

The holiday party will cost $160 if 8 people attend. if there are 40 people who attend the party, how much will the holiday party cost

1yd 1 ft = 1 1/12 1 1/3 1 1/2 1 1/6