Benji is conducting an experiment he has 0.78 L of solution to the body evenly among a petri dishes how much solution should you put each petri dish​

What is the standard deviation of the following data set rounded to the nearest tenth? 3, 17, 18, 15, 12, 21, 9

What is the total surface area of this square pyramid?

Louis wants to carpet the rectangular floor of his basement.the basement has an area of 864 square feet.the width of the basement is 2/3 it's length. what is the length of louis's basement