Using the relation between velocity, distance and time, it is found that her average speed for the final 30 miles is of 55.56 mph.
<h3>What is the relation between velocity, distance and time?</h3>
Velocity is distance divided by time, that is:
Simone travels 90 miles at an average speed of 40 mph, hence the time is given by:
She then travels a further 30 miles, with an average speed for the journey of 43 mph. Hence, she traveled 90 + 30 = 120 miles, and the total time is given by:
Hence, in the second part, she traveled 30 miles in 2.79 - 2.25 = 0.54 hours, so the velocity is given by:
Her average speed for the final 30 miles is of 55.56 mph.
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Answer:
probably 32% or 24%
Step-by-step explanation:
well there is more green marbles then blue and red so if pulling a green that would maybe make it 56%
Answer:
a) We need a sample size of at least 705.
b) We need a sample size of at least 1692.
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of 
, and a confidence level of 
, we have the following confidence interval of proportions.
In which
z is the zscore that has a pvalue of 
.
The margin of error is:
90% confidence level
So 
, z is the value of Z that has a pvalue of 
, so 
.
a) If she uses 1999 estimate of 11.8% obtained from the Current Population Survey.
We need a sample of size at least n
n is found when 
.
So
Rounding up
We need a sample size of at least 705.
b) She does not use any estimate.
Same thing as above, we just use 
when do not use any estimate.
Rounding up
We need a sample size of at least 1692.
Answer:
I'm sorry I don't know the ratio but the whole number of students is 164 and dance students is 43 i hope this helps if not im sorry i tried to help
Step-by-step explanation:
