The time t required to drive a certain distance varies inversely with the speed r. If it takes 2 hours to drive the distance at
1 answer:
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Answer:
And we can find this probability using the complement rule and we got:
Step-by-step explanation:
Previous concepts
Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".
The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".
Solution to the problem
Let X the random variable that represent the weights of a population, and for this case we know the distribution for X is given by:
Where and
We are interested on this probability
And the best way to solve this problem is using the normal standard distribution and the z score given by:
If we apply this formula to our probability we got this:
And we can find this probability using the complement rule and we got:
Step-by-step explanation:
a). The decimal numbers is equal to the sum of binary numbers times their powers of
That is,
=
= 58490
b).
The left most bit of the number represents the sign of the number. If bit = 1, the number is negative else if the bit is 0, the number is positive.
All the remaining bits (i.e all the bits except the leftmost bit) represent the magnitude of the number.
Now, X = 1110 0100 0111 1010
left most bit = 1 => number is negative
remaining bits Y = 110 0100 0111 1010
converting Y to decimal => Y = 25722
c).
Check the leftmost bit(lmb) of the number
if leftmost bit is 0 => convert do the binary to decimal conversion
if leftmost bit is 1, follow the following steps
1. Flip the bits (convert the 0's into 1's and the vice versa)
2. convert the new number from binary to decimal.
3. Add a negative sign / multiply by -1
Now, X = 1110 0100 0111 1010
left most bit = 1;
flipping the bits => Y = 0001 1011 1000 0101
converting Y into decimal => Y = 7045
multiplying Y with -1 => Y = -7045
Therefore, one's complement of X to decimal is -7045
Thus, X = -25722 in decimal.
d).
Check the leftmost bit(lmb) of the number
if leftmost bit is 0 => convert do the binary to decimal conversion
if leftmost bit is 1, follow the following steps
1. Flip the bits (convert the 0's into 1's and the vice versa)
2. convert the new number from binary to decimal.
3. Add 1 to the converted number
4. Add a negative sign / multiply by -1
Now, X = 1110 0100 0111 1010
left most bit = 1;
flipping the bits => Y = 0001 1011 1000 0101
converting Y into decimal => Y = 7045
Adding 1 to Y => Y = 7046
multiplying Y with -1 => Y = -7046
Thus, two's complement of X to decimal is -7046