The answer for this question is C: an exiting celebration.
I hope this helped~!
Answer:
1. EFFECT
a. Modern Western medicine can have unpleasant side <u>effects.</u>
b. In China, acupuncture has been found to be <u>effective</u> for centuries.
2. SUCEED
a. Biofeedback methods have been <u>successful </u> in treating headache and muscle pain.
b. The vaccine has been working <u>successfully</u> for the last ten years.
3. PROVE
a. There is little <u>proof</u> that reflexology works.
b. It is difficult to <u>prove</u> how herbal medicine cures illnesses.
Answer: 0.9765
Explanation:
The cumulative distribution function for exponential distribution for random variable x is given by :-
, where
is the mean of the distribution .
Given : On average, 5 customers arrive at the drive-up window of a fast-food restaurant every 4 minutes during the lunch hour.
Then 
Now, the probability that the next customer will arrive within three minutes :-

Hence, the probability that the next customer will arrive within three minutes = 0.9765
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