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I was looking at these examples here:
Example 1:
Given a normal distribution of values for which the mean is 70 and the standard deviation is 4.5. Find:
a) the probability that a value is between 65 and 80, inclusive.
b) the probability that a value is less than 62.
1a:
-> The probability is 85.361%.1b:
-> The probability is 3.772%.
I'm kind of confused if nornamlcdf() is inclusive or exclusive. It seems to be inclusive in 1a. because the upperbound and lowerbound include 65 and 80. In 1b. it asks for values less than 62, so if the upper and lower bound are not inclusive than why is the upperbound 62 instead of 61?
Solve for x: 3cosx + sin2x = 1
0 <= x <= 10
Answer:1.37, 5.44, 7.65
I tried converting sin2x to 2sinx * cosx, but I don't know what to do after that
A rally car drives at 140 km/h for 45 minutes on a bearing of 32 degrees and then 180 km/h for 40 minutes on a bearing of 317 degrees. Find the distance and bearing of the car from its starting point. I was able to find the distance correctly, but I keep getting 137 degrees as the bearing. The correct answer is 352 degrees. This is what I've done so far.
Hi, could someone explain why the area of each is
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