How do you know a graph represents direct variation?
2 answers:
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Answer:
t = 5 seconds
Step-by-step explanation:
We have,
Speed of the truck, v = 4 m/s
It is required to find the time taken by a truck to travel 20 meters. It can be assumed that the time is t. Using the formula of speed.
After rearranging, we get :
So, the time taken by a truck to travel 20 meters is 5 seconds.
Answer: 0.283
Step-by-step explanation:
Formula to find the lower limit of the confidence interval for population proportion is given by :-
, where = sample proportion.
z* = Critical value
n= Sample size.
Let p be the true proportion of people who would purchase a defective item.
Given : Sample size = 993
Number of individuals would buy a slightly defective item if it cost less than a dollar = 305
Then, sample proportion of people who would purchase a defective item:
Critical value for 90% confidence interval = z*=1.645 (By z-table)
The lower bound of a 90% confidence interval for the true proportion of people who would purchase a defective item will become
[rounded to the nearest three decimal places.]
Hence, the lower bound of a 90% confidence interval for the true proportion of people who would purchase a defective item.= 0.283