Each number is mutliplied by 3 and then numbers 2,3,4,5,... are added successively.
2*3+2=8
8*3+3=27
27*3+4=85
85*3+5=260
260*3+6=786
So it's 786.
Btw, the general formula for this sequence is
3(5+4b)?? Simply the expression
2 answers:
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Given:
Angle A = 18.6°
Angle B = 93°
Length of side AB = 646 meters
To find:
the distance across the river, distance between BC
Steps:
Since we know the measure of 2 angles of a triangle we can find the measure of the third angle.
18.6° + 93° + ∠C = 180°
111.6° + ∠C = 180°
∠C = 180° - 111.6°
∠C = 68.4°
Therefore the measure of angle C is 68.4°.
now we can use the law of Sines,
meters
Therefore, the distance across the river is 222 meters.
Happy to help :)
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