At a local community college, 55% of students who enter the college as freshmen go on to graduate. four freshmen are randomly selected.

a. what is the probability that none of them graduates from the local college? (round your intermediate calculations and final answer to 4 decimal places.)

b. what is the probability that at most three will graduate from the local college? (round your intermediate calculations and final answer to 4 decimal places.)

c. what is the expected number that will graduate? (round your final answer to the nearest whole number.)

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step-by-step explanation:

reduce the friction between its moving parts

step-by-step explanation:

in fact, by reducing the friction between the moving parts of the machine, it is possible to reduce the energy wasted due to this friction; therefore, more input energy is converted into useful work, and this will improve the efficiency of the machine.

(2,20) means that the 2 is 2 hours and 20 is 20$. so there both 20$ for 2 hours only the same price. like it says. so, the dunk tank and the bounce house are the same price (20$) for the same amount of time (2 hours).

hope i

they disappear if your absent from to long. i found out that the hard way.

step-by-step explanation:

brainliest lol i just need one more brainliest.