4. Simplify: (3x2 + 3x + 1) + (x2 + x + 5)
2 answers:
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<u>Answer:</u>
The length of the person’s shadow is 5.7ft
<u>Explanation:</u>
Length of the flagpole =a= 35ft
Length of the shadow of the flagpole= b=50ft
Length of the person=c= 4ft
Suppose the length of the person’s shadow is=d
According to the rules of trigonometry
35d=200
d=
d=5.7ft
Hence, The length of the person’s shadow is 5.7ft.
A.
from the question,
the total speed for the pedestrian is
40km and the total time is 10hr
substitute them in the formula, we get
speed = 4km/hr
B. 10hrs - 6hrs = 4hours
C. BC is deacceleration = -dv/dt
CD is constant acceleration = dt = 0