Answer:
0.945200708
Step-by-step explanation:
In this question, we are asked to calculate the probability that a person selected at random would live less than 65.
To solve this problem, what we need to do is to first calculate the z-score.
Mathematically, z = (x-mean)/standard deviation
According to the question, the mean is 53 years and the standard deviation is 7.5
Substituting these values in the z-score equation:
Z-score = (65-53)/7.5 = 12/7.5 = 1.6
We proceed to use the z-score table to obtain the probability. Using the table, z score of 1.6 corresponds to a probability of
0.945200708
Answer:
1/6
Step-by-step explanation:
Answer: 2.6
Step-by-step explanation:
PQ = QR (because it’s a rhombus), so
9b - 5 = 3b - 0.8
b = 0.7
And RS = PQ (again because rhombus), so RS = 9b - 5 = 1.3. Since RT is twice RS, we have
RT = 2(1.3) = 2.6.
3*40 + x / 4 = 45.
The answer of x comes out to be 60. Which means that the speed was travel around 60 miles per hour in the last one hour of the total journey.
Well to understand how i constructed its equation is very simple. I equated the total average speeds answer to 45 and just calculated the average speeds with the help of algebra where x is the number of miles..
