Answer:
length=52mm
Step-by-step explanation:
For an equilateral triangle A=B=C=x
perimeter= A+B+C
156=x+x+x
3x=156
x=52mm
The formula is rad (-6-(-3))^2 + (7-0)^2 which equals 7.6
Answer:
Mean $1060
Standard error $34.69
Step-by-step explanation:
The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean and standard deviation , the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean and standard deviation, which is also called standard error, .
For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.
Population:
Mean $1,060 and standard deviation $190.
Sampling distriution of samples of size 30:
Mean $1060
Standard deviation