<span> rule describes this sequence is
</span><span> an = 2 ( n^2 + n )
n = 1
</span> an = 2 ( 1^2 + 1 )
an = 2 ( 1 + 1 )
an = 2 ( 2 )
an = 4
n = 2
an = 2 ( 2^2 + 2 )
an = 2 ( 4 + 2 )
an = 2 ( 6 )
an = 12
n = 3
an = 2 ( 3^2 + 3 )
an = 2 ( 9 + 3 )
an = 2 ( 12 )
an = 24
n = 4
an = 2 ( 4^2 + 4 )
an = 2 ( 16 + 4 )
an = 2 ( 20 )
an = 40
Answer:
30°
Step-by-step explanation:
The angle in question is half the measure of the angle subtended by the chord, which is 60°. The chord is equal to a radius in length, so it and the radii to its ends form an equilateral triangle. The angle at the center of the circle is then 60°.
Half the measure of the subtended angle is 60°/2 = 30°.
You can analyze it in this way:
1)(2) in y2-2y can show that was (y-1)^2 so we add -1 to -8 => -9
2)(8) in x2-8x show us that was (x-4)^2 so we add -16 to -9 => -25
and finally we have:(x-4)^2 + (y-1)^2 =25
it means C is true!
It was increasing for two hours seeing as the graph only went up for that amount of time.
