You are making 100 mL of a saline solution in science class that has a strength of 50%. You are going to mix some 40% saline solution with some 60% saline solution to do this.
How much of each should you add?

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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:

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?

What effect would doubling all the dimensions of a triangular pyramid have on the volume of the pyramid? explain your reasoning.