Answer:
A :) Sorry if it's wrong, I'm learning this too
Complete Question
The complete qustion is shown on the first uploaded image
Answer:
The correct option is B
Step-by-step explanation:
From the question we are told that
The sample size is 
The mean is 
The standard deviation is 
Generally the standard error of this measurement is mathematically represented as
substituting values
ppb
Now the probability that the mean lead level from the sample of 49 measurements T is less than 15 ppb represented as P(X < 15 )
Next is to find the z value


Now checking the z-table for the z-score of -1 we have

you can withdraw 11 times before it reaches the minimum of $100
Answer:
3) directly above the package.
Step-by-step explanation:
The plane and the package carried by the plane are traveling with the same horizontal speed. When the package is dropped, a new vertical component of velocity is added to the package. The vertical velocity increases because of the acceleration due to gravity. The horizontal speed of the package remains the same. As long as the plane continues to fly at the same speed, the package hits the ground directly below the plane.
Answer: 3) directly above the package.