Tour answer 1 point
Are all musical instruments tuned equally? For concerts they are. This is
known as "concert pitch," and it's based on setting the frequency of the A
key above middle C to 440 Hz. The frequency of any other note on the
piano, in Hz, is then related to its position on the keyboard by the function
below, where n is the number of keys above or below the "concert A.”
Using this function, can you find the position n of the key that has a
frequency of 55 Hz?*
f(n) = 440.27
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Acollection of coins has value of 64 cents. there are two more nickels than dimes and three times as many pennies as dimes in this collection. how many of each kind of coin are in the collection?

Answer asap evaluate 4-0.25g+0.5h4−0.25g+0.5h when g=10g=10 and h=5h=5.

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?