9514 1404 393
Answer:
Step-by-step explanation:
The speed against the wind is ...
4680 mi/(8 h) = 585 mi/h
The speed with the wind is ...
5720 mi/(8 h) = 715 mi/h
The speed of the airplane in still air is the average of these speeds:
(585 +715)/2 = 650 mi/h . . . speed in still air
The speed of the wind is the difference between the airplane speed and the speed in the wind:
715 -650 = 65 mi/h . . . speed of the wind
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<em>Additional comment</em>
If p and 'a' represent the speeds of the plane and the air, the speeds with and against the wind are ...
p + a = with
p - a = against
If we average these, we get ...
((p +a) +(p -a))/2 = (with + against)/2
p = (with + against)/2 . . . . . . . the formula we used above
Answer:
use photo math the two on the right are different lol that's all i know
Step-by-step explanation:
Answer:
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Step-by-step explanation:
Answer:
b. members of a local gym who exercise regularly have lower mean cholesterol levels than those in the community who do not exercise regularly.
Step-by-step explanation:
From the research, the researcher compared the cholesterol levels of 50 people who belong to a local gym and exercise regularly with the cholesterol levels of 50 people from the community who do not exercise regularly, and found out that the cholesterol levels of the members of the gym were substantially lower. This only proves and ascertain that the members of a local gym who exercise regularly have lower mean cholesterol levels than those in the community who do not exercise regularly. And does not lead to a general conclusion that exercising regularly reduces cholesterol level as there are other variables and data that are not considered/available (such as data on cholesterol levels of people before and after they joined the gym and exercise regularly). Other factors that may affect change in cholesterol levels must also be considered before making a general conclusion on the effect of regular exercise on cholesterol level.
