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branj1317
11.09.2019 •
Mathematics
What is the least number of transformations performed to create similar rectangle k' from rectangle k?
a. 1; rotation about the origin
b. 2; rotation about the origin, dilation
c. 3; rotation about the origin, translation, dilation
d. 4; reflection across y-axis, dilation, translation, rotation about origin
(not b.)
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Ответ:
C.3; rotation about the origin, translation, dilation
Step-by-step explanation:
The first obvious step is to rotate it 270° counterclockwise [90° clockwise], next you translate it, then you dilate [long and wide].
I hope this helps you out alot, and as always, I am joyous to assist anyone at any time.
Ответ:
(a) 0.24
(b) 0.76
Step-by-step explanation:
We are given that let Y be the number of homes with a dust mite level that exceeds 2 mg/g. The probability distribution for Y=y is shown below ;
y P(y)
0 0.09
1 0.30
2 0.37
3 0.20
4 0.04
(a) Probability that three or four of the homes in the sample have a dust mite level that exceeds 2 µg/g = P(y = 3) + P(y = 4)
= 0.20 + 0.04 = 0.24 .
(b) Probability that fewer than three homes in the sample have a dust mite level that exceeds 2 µg/g = P(y = 0) + P(y = 1) + P(y = 2)
= 0.09 + 0.30 + 0.37 = 0.76 .