Hi there!
With a normal distribution, we can use the operation 'normalcdf' on a calculator to find the probability that a randomly selected adult has an IQ between 96 and 111.
Here is the format for using the operation:
<h2>normalcdf(LB, UB, μ, σ) </h2>
LB = Lower bound (96)
UB = Upper bound (111)
μ = Mean of normal distribution (100)
σ = Standard deviation of normal distribution (15)
Plug in the given values into the calculator and solve.
Answer:
d. y=-1; x=7
Step-by-step explanation:
Answer:
Step-by-step explanation:
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Answer: flight to NYC
distance: 740 rate: 495+x time: 740/495+x
flight home:
distance: 740 rate: 495-x time: 740/495-x
Step-by-step explanation: the plane is flying with the wind when flying to NYC so the planes speed, or rate, can be modeled as 495+x
on the flight back home plane is flying against the wind so the planes speed, or rate, can be modeled as 495-x
multiply across the table to find the time each journey will take by using the equation time=distance/rate. Hope this helped :)
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