The rates of on-time flights for commercial jets are continuously tracked by the u. s. department of transportation. recently, southwest air had the best reate with 80 % of its flights arriving on time. a test is conducted by randomly selecting 12 southwest flights and observing whether they arrive on time. (a) find the probability that exactly 4 flights arrive on time. (b) would it be unusual for southwest to have 9 flights arrive on time?

a_n = a_1 + (n - 1)d

the first term is 6.

the common difference d = ?

when you find d, replace n with 7 and d with the common difference to find your answer.

it is definatly the 3rd one. very much looks like it, for a good chance, the third one would be best for you.

8(4)^8=72^feet to say that the total can conclude to 8(4) which as you know would mean 8 x 4. that equals 32w. 32^ could make a 72 answer as well. but your coefficent will remain w so your answer is 72w.

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