An electric motor manufacturer tests it motor after production. In a test, the motor speed in RPM (revolutions per minute) is measured under the same conditions and recorded at regular time intervals as follows: 850, 890, 930, 900, 980, 950, 1010, 1150. Calculate the mean value, standard deviation, and the best estimate of the true value of this data set. Over what interval would 50% of the entire population of motor speed values fall

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:

a is the right answer

6,250

step-by-step explanation:

to get the area, multiply 360 by 160.(57,600)

to find out how many bags of fertilizer it will take, first figure out how many square feet one bag can hold. divide 1000 by 8(125) to get the unit rate(how many square feet one pound of fertilizer can hold)and multiply it by 50(6250). if i haven't made a mistake, that is the answer.