S = a / (a - r)...multiply both sides by (a - r)
S(a - r) = a
Sa - Sr = a
Sa - a = Sr
(Sa - a) / S = r or it could be : (aS - a) / S = r
Practice, practice & practice.
We use the trigonometric function for this case. An escalator is an inclined path. We form a right triangle since we have given the value of the height. The height from the first floor to second floor is called the adjacent while the travelled distance of the people is called the hypothenuse. We use cosine function because we are given in terms of adjacent and hypothenuse. The ratio of cosine function is
cos x = a/h
where x is the angle
Solving for h,
h = a/(cos x) = 21/(cos 30) = 24.25 ft
J stands for Jon, A stands for Angelica, and C stands for Chaya.
J = C - 3
A = C + 4
C = A - 4
= 196 h
62 + 65 + 69 = 196
Jon worked 62 hours, Chaya worked 65 hours, and Angelica worked 69 hours.
And that's your answer! ^ I hope this helped you! c:
1/4 in fraction form, or 0.4 in decimal
