x+9<15
Answer:
x<15-9
x<6
Step-by-step explanation:
Answer: The jet's speed from A to B would be 5.5 km/hr.
Step-by-step explanation:
Since we have given that
Distance = 2500 meter
Outbound speed be x
Average speed be
Time = 9 hours 10 minutes =
According to question, it becomes,
Hence, the jet's speed from A to B would be 5.5 km/hr.
B 95%
C 10%
D 5%
Answer: Option 'A' is correct.
Step-by-step explanation:
Since we have given that
Population Mean weight ()= 10 grams a piece
Standard deviation of the weight of a box = 3 grams
Number of mints = 10
We need to buy a box of mints that weighs 95 grams.
Sample mean is given by
First we find out the standard error which is given by
Since it is normal distribution, so, we will find z-score.
The area to the left of a z-score of -0.53 = 0.29805.
So, it may be 90% or 95 % confidence.
For 95% confidence level,
Similarly,
For 90% confidence level,
We have little confidence that the box he bought did not come from the factory. that is much smaller than 0.05.
So, it is safe to assume 90% confidence.
So, we will get 90% confidence, critical value = 1.645
Margin of error is given by
So, confidence interval will be
(10-1.56,10+1.56)
=(8.44,11.56)
Hence, Option 'A' is correct.