HEY! PLEASE HELP ME WITH THIS MATH QUESTION! THE CORRECT ANSWER WILL BE MARKED AS BRAINLIEST AND I WILL ALSO FOLLOW YOU (you will also receive points) THANKS xoxo

Which is the graph of the function y=2(4)^x

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

Bob is putting books on a shelf and takes a break after filling 18 1/2 inches on the book shelf. the book shelf is now 2/3 full. how long is the entire bookshelf?