Acollege-entrance exam is designed so that scores are normally distributed with a mean of 500 and a standard deviation of 100. using the eight-part symmetry of the area under a normal curve, what is the probability that a randomly chosen exam score is above 800? the probability

The probability is  0.0015

Step-by-step explanation:

We know that the average is:

The standard deviation is:

The Z-score is:

We seek to find

The Z-score is:

The score of Z = 3 means that 800 is 3 standard deviations from the mean. Then by the rule of the 8 parts of the normal curve, the area that satisfies the conficion of 3 deviations from the mean has percentage of 0.15%

So

2.

according to newton’s cannonball model, what happens if the cannonball's velocity is enough to overpower the pull of earth’s gravitystep-by-step explanation:

b

step-by-step explanation: