Answer:
The answer is A
Step-by-step explanation:
Supplementary angles are angles which add up to 180°
∠1 and ∠3 add up to 180°, so they are supplementary.
What. This makes no sense. I am screaming in pain an confusion. Why have you chosen to do this. You need to give me detailed questions if you want people to answer. I am sorry that I cannot come up with a solution.
Answer:
The probability of testing positive for one is 0.20.
The probability of testing negative for one sample is (1-0.2)=0.8.
We only save time when all five are negative, which has a probability of 0.8^5=0.32768.
This means that the expected number of tests is
combined sample tests negative = 1 with probability 0.32768
combined sample tests positive = 1+5 retests = 6 with probability 0.67232
Expected number of tests
=Σ nipi / n
=(1*0.32768+6*0.67232)/5 [divide by 5 because we tested 5 samples]
= 0.87232 < 1
So yes, there is a saving.
Note: In practice, all medical tests are not absolute, i.e. they give false-positives(α) and false-negatives (β). The ratios 1-α and 1-β are respectively measures of specificity and sensitivity.
These two parameters complicate the simplistic evaluation above.
This one is cos 52 = a/2.4
a = 2.4 cos 52
a = 1.477 m long shadow
M = 0,5 kg
v = 10m/s
Ec = mv²/2
Ec = 0,5 . 10²/2
Ec = 0,5 . 100/2
Ec = 50/2
Ec = 25 J