A physics class conducted an experiment comparing the period of a pendulum to the length of the pendulum. The results of the experiment are given in the table below. Use regression to find the mode of the data given. What was the value of a in the model of data? Round your answer to two decimal points.

You drop a rubber ball off the roof of a 50 meter high building onto a paved parking lot. it bounces back up with every bounce, but not quite all the way back up to you. after the first bounce it bounces back only 80 percent of the distance it was dropped from. the pattern continues, meaning after every bounce it comes up to just 80 percent of the previous maximum height. so if before the first bounce the height is 50 meters, what height does the ball reach after the fifth bounce? round your answer to one decimal place and chose the correct response from the choices below:

45% of the trees in a park are apple trees. there are 27 apple trees in the park. how many trees are in the park in all?

Awater tank holds 18000 gallons. how long will it take for the water level to reach 6000 gallons if the water is used at anaverage rate of 450 gallons per day