Answer:there are 126 dogs, 86 cats, and 42 pigs
Step-by-step explanation:# of dogs - 40 = # of cats then you divide # of dogs by 3 and add em up to get 254 animals
Answer:
13
Step-by-step explanation:
a shape rotated does not change the side and angle measurements.
A rotation is an isometric transformation, isometric transformations do not change the size or shape of a figure and the side and angle measurements remain intact.
Answer:
Yes
Step-by-step explanation:
The central limit theorem says that If a random variable X from a population has mean u and finite variance σ² , then the sampling distribution of the sample mean X~ approaches a normal distribution with mean u and variance σ²/n as the sample size n approaches infinity.
It is interesting to note that we have neither assumed that the distribution of X is continuous nor we have said anything about the shape of the distribution , whereas the limiting distribution of X is continuous and normal. Thus the distribution of the sample means regardless of the shape of the population having a finite variance , is approximately normal with mean u and variance σ²/n .
Therefore
(standard deviation/ √sample size)²= variance / n
2/ √20
= 2/4.472
=0.44721
The sampling distribution of X` is therefore approximately normal with mean ux=u and σx =σ/n