Answer:
x=28
y=28
Step-by-step explanation:
the two angles are right angled therefore the angle must add up to 90
19. measure angle 1 is 135°
20. measure angle 4 is 90°
21. measure angle 5 is 90°
22. measure angle 8 is 45°
You can use All Students Take Calculus (ASTC) to remember when the trig ratios are positive or negative. ASTC goes with the quadrants. A is All, S is sin, T is tangent, C is cosine, and they are positive in those quadrants.
So ALL (sin, cos, tan) are positive in quadrant I, only sin is positive in quadrant II, only tan is positive in quadrant III, and only cos is positive in quadrant IV.
So it says sin < 0, so sin is negative.
And cos > 0, is cos is positive.
Remembering ASTC, the only quadrant with cos positive is quadrant IV.
4000/5 people = 800 hours per person.
5x8 = 40 hours a week per person
40x5 people = 200 hours a week with all 5 people working.
800/200 = 4 weeks
The answer is 4 weeks
