After 3.5 hours pasha had traveled 217 miles if she travels at a constant speed how far will she have traveled after four hours

The graph represents the gallons of water in a water tank with respect to the number of hours since it was completely filled

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

Me d is also an option but i couldn't get it in the picture