-10 = -0.2c what is c

How many square feet of out door carpet will we need for this hole? 8ft 3ft 12ft 4ft

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

If you could answer these your a life saver