Since the circle is centered at the origin, we can use the equations
x² + y² = r²
x = r cos θ
y = r sin θ
We know y = 8 and r = 10. Solving for x
x² + 8² = 10²
x = 6
From this equation:
x = r cos θ
6 = 10 cos θ
cos θ = 6/10 = 0.6
It is the last one. A closed circle means less than or equal to, so that crosses out the top two. The third says five is greater and we know that is not true because the line is decreasing in value. It must be the fourth.
-1, 5/2
And in decimal form 1, 2.5
Answer:
the weight of the steel beam and steel beam length
let y be weight and x be length of it
y=ax
where a is the constant
we can find it if we have two sets of values of y and x
