It should be 90 because in question it says that
The vector from the reference point on the line to the point is
.. (5-2, 1-3, 4-3) = (3, -2, 1)
The cross product of this with the line's direction vector (-1, 1, -3) is (5, 8, 1). The dot product of that with any of the points in the problem statement is 37. Your plane equation can be written as
.. 5x +8y +z = 37
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A suitable vector calculator is very handy for this. I used an HP-48 app on my phone.
answer 8000cm
Step-by-step explanation:
1/2=bxh
1/2×20×800
#2. On the moon you would have periods where the sun blocks the Earth and other times when the Earth blocks the sun.
The locus is the circle with its radius that size and its center at that point.
Its equation is (x+3)^2 + (y+1)^2 = 81.