Since a right triangle has one known angle (90°) and the sum of a triangles interior angles are 180°, you can take a given angle (like 36°) and add it to 90° and then subtract 180 from it.
Essentially, do the following:
A = 90-givenAngle
A = 180- ^^^^^^^^
The last one. because you are starting 1sec after the can has begun to pour. So, (1, 9.60) and the subsequent ordered pairs are correct
Answer:
60
Step-by-step explanation:
15 times 4
Answer:
3.9 mi/h
Step-by-step explanation:
We assume that the given speeds are the speeds of the boats relative to the water. If c is the speed of the current, we have ...
time = distance/speed
47/(15 +c) = 40/(20 -c)
47(20 -c) = 40(15 +c) . . . . . . multiply by (20-c)(15+c)
940 -600 = 40c +47c . . . . . add 47c-600
340 = 87c . . . . . . . . . . . . . . . simplify; next divide by 87
c = 340/87 ≈ 3.9080 . . . . mi/h
The speed of the current is about 3.9 mi/h.