The price of a radio changes from $40 to $44

Which of the following are accepted without proof in a logical system? check all that apply.

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 two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16