Some IQ tests are standardized to a Normal model N(100,18). a) What cutoff value bounds the highest 5% of all IQs? b) What cutoff value bounds the lowest 20% of the IQs? c) What cutoff values bound the middle 70% of the IQs?

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step-by-step explanation:

let y equal to

the total fare and x is the mile of taxi ride. so the equation is

y = 0.55x + 1.75

since susie has

$10 to spend for a taxi cab, so he can have

10 = 0.55x +

1.75

x = 15 miles of

taxi ride

so the system of

inequality is

10 < 0.55x +

1.75

x > 2

it would be a on edgenuit y

the diagram below is your final answer