Five buses leave on a field trip .There are about 45 students per bus. About how many students are on the 5 buses.

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 suare root of 9x plus 7 plus the square rot of 2x equall to 7

Two variables, x and y, vary inversely, and x=12 when y=4. what is the value of y when x=3?