The amount that people spend per month on entertainment follows a normal distribution with a mean of $175 and standard deviation of $40. What is the probability that a person spends less than $149.80 per month on entertainment? (round to 4 decimal places, for example 0.1234)

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step-by-step explanation:

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step-by-step explanation:

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answer: - (a)

(b) 88 seats

step-by-step explanation:

given: in an auditorium, there are 22 seats in the first row and 28 seats in the second row.

thus first term=

second term=

the number of seats in a row continues to increase by 6 with each additional row.

⇒d= 6

a) given formula :

b)   let the number of seats (n) = 12

substitute n=12 in the explicit rule formed in (a)

∴there are 88 seats in 12 rows.