1. 6(12+4)
2. 10+4(2+20)
3. 7(4+19)

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

Find the distance between c and d on the number line c=3 and d=11

Sara made $253 for 11 hours of work. at the same rate how much would he make for 7 hours of work?