20C0 - 20C1 + 20C2 - 20C3 + . . . + 20C10 = 1 - 20 + 190 - 1,140 + 4,845 - 15,504 + 38,760 - 77,520 + 125,970 - 167,960 + 184,756 = 92,378
Answer:
10cm
Step-by-step explanation:
the formula for an area of a trapezium:

where a and b are the parallel sides and h is the height. equating what we have:

simplify the numerator by adding 19.8 and 7.2=27

multiply both sides by 2

divide both sides by 27

the height is 10cm
Answer:
750,000 bytes
Step-by-step explanation:
if you place 500 as p, the answer would be 750,000 bytes.
Answer:
A . About 95% of all random samples of 50 students from this population would result in a 95% confidence interval that covered the population mean number of hours of sleep per day.
Step-by-step explanation:
x% confidence interval:
A confidence interval is built from a sample, has bounds a and b, and has a confidence level of x%. It means that we are x% confident that the population mean is between a and b.
In this question:
95% CI from a sample of 50 students is (6.73, 7.67).
This means that we are 95% sure that the population mean is in this interval, that is, about 95% samples of 50 would contain the population mean, which is given by option A.