Answer:
11970 barrels of oil
Step-by-step explanation:
1 day use 285 barrels of oil
6 weeks = 6*7 = 42 days
42 days use: 42 * 285 = 11970 barrels of oil
Hope this help you :3
Answer:
Second degree
Step-by-step explanation:
f(x) = 4 X 3 + 3 X 2 + 5x + 7
It can be represented as follow: x² X 3 + 3 X 2 + 5x + 7
3x² + 6 + 5x + 7
3x² + 5x + 13
Answer: 0.0228
Step-by-step explanation:
Given : The mean and the standard deviation of finish times (in minutes) for this event are respectively as :-

If the distribution of finish times is approximately bell-shaped and symmetric, then it must be normally distributed.
Let X be the random variable that represents the finish times for this event.
z score : 

Now, the probability of runners who finish in under 19 minutes by using standard normal distribution table :-

Hence, the approximate proportion of runners who finish in under 19 minutes = 0.0228