Help me please and hurry 20 points
1 answer:
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Answer: A. (-2,8)
Step-by-step explanation:
We know that the rule for rotation of is given by :-
, where (x,y) is the point of pre-image and (-y,x) is a point of image.
The given point of pre-image : A(8,2)
Then after rotation of , we have the image point as :-
Hence, the image point of A(8,2) is (-2,8) .
Answer:
Step-by-step explanation:
Given that,
A bricklayer needs to order 6300kg of building sand.
1 grain of this sand weighs .
We need to find how many grains of sand are there in 6300 kg.
It can be just calculated as follows :
1 grain of sand =
or
= 90000000 grans of sand
So, 6300 kg is equal to .