Answer:
Step-by-step explanation:
a) tanθ = x/3
θ = arctan(x/3)
:::::
b) cosθ = 9/x
θ = arccos(9/x)
Step-by-step explanation:
tan30° = Height of person / (Distance away from river bank + river's width) = 1/√3.
Therefore 1.6m / (2m + x) = 1/√3
By cross multiplication, 1.6√3 = 2 + x.
Hence, x ≈ 0.77m.
Answer:
the missing section is 49%
Step-by-step explanation:
11 + 18 + 15 + 7= 51
51 + 49 = 100
add the percentages together and you get 100%
Answer: 720 mph or 12 miles a minute
Step-by-step explanation:
