A baker mixes 1 3/4 pounds of sugar for every 7/8 pound of butter to begin making frosting. The baker uses 168 pounds of butter and sugar to start the frosting. How much sugar does the baker use?

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Given the two similar triangles, how do i find the missing length? if a=4, b=5, and b'=7.5 find a'

In a test for esp (extrasensory perception), a subject is told that cards only the experimenter can see contain either a star, a circle, a wave, or a square. as the experimenter looks at each of 20 cards in turn, the subject names the shape on the card. a subject who is just guessing has probability 0.25 of guessing correctly on each card. a. the count of correct guesses in 20 cards has a binomial distribution. what are n and p? b. what is the mean number of correct guesses in 20 cards for subjects who are just guessing? c. what is the probability of exactly 5 correct guesses in 20 cards if a subject is just guessing?