Weekly wages at a certain factory are normally distributed with a mean of $400 and a standard deviation of $50. Find the probabi
lity that a worker selected at random makes between $250 and $300.
2 answers:
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Answer:
3 - 48
Step-by-step explanation:
Given
(a + 2)(3a² + 12)(a - 2)
= (a + 2)(a - 2)(3a² + 12) ← expand the first pair of parenthesis using FOIL
=(a² - 4)(3a² + 12) ← expand using FOIL
= 3 + 12a² - 12a² - 48 ← collect like terms
= 3 - 48