Your jewelry business orders $405 in supplies. You can usually sell an earring/ring set for about $45 each. How many sets do you need to sell each month to break even?

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:

If 20% of a number is 35, what is 50% of that number?

State if the two triangles are congruent. if they are, state how you know?