Last year there were 43 science projects submitted by students at a science fair. this year there are 52 science projects. to the nearest tenth, what is the percent of change in the number of science projects submitted?

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:

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

Anature center offer 2 guided walks. the morning walk is 2/3 miles. the evening walk is 3/6 mile. which is shorter