he amount of filling in a Doughiest Donut Boston cream donut follows a Normal distribution, with a mean of 3 ounces and a standard deviation of 0.4 ounce. A random sample of 36 donuts is selected every day and measured. What is the probability the mean weight will exceed 3.1 ounces?

given that triangle abc is transformed two times to get triangle

a"b"c"

first abc is transformed in to a'b'c' as follows:

the coordinates of a are (1,-1) and transformed into a'(-1,1)

similarly b (4,-2) became b'(-4,2) and

c(7,-2) became c'(-7,2)

i.e. (x,y) becomes (-x,-y)

this is nothing but reflection about a point here origin.

thus first transformation is reflection on the origin.

next is exactly shifting 3 units down

source:

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