A chemist has three different acid solutions. The first acid solution contains 15 % acid, the second contains 30 % and the third contains 50 %. He wants to use all three solutions to obtain a mixture
of 96 liters containing 40 % acid, using 3 times as much of the 50 % solution as the 30 % solution.
How many liters of each solution should be used?
liters of 30 % solution,
The chemist should use
liters of 15 % solution,
and
liters of 50 % solution.

An arc subtends a central angle measuring 7pi/4 radians what fraction of the circumference is this arc?

Someone answer asap for ! max recorded the heights of 500 male humans. he found that the heights were normally distributed around a mean of 177 centimeters. which statements about max’s data must be true? a. the median of max’s data is 250 b. more than half of the data points max recorded were 177 centimeters. c. a data point chosen at random is as likely to be above the mean as it is to be below the mean. d. every height within three standard deviations of the mean is equally likely to be chosen if a data point is selected at random.

Consider an example of a deck of 52 cards: example set of 52 playing cards: 13 of each suit clubs, diamonds, hearts, and spades ace 2 3 4 5 6 7 8 9 10 jack queen king clubs diamonds hearts spades what is the probability of drawing three queens from a standard deck of cards, given that the first card drawn was a queen? assume that the cards are not replaced.