The question is about square root
2 answers:
You might be interested in
The constant speed, or "average rate of change" is their slope.
so hmmm looking at Fred's graph, let's pick two points on the line, say 0,0 the origin and 8,2
now, for Sam, let's use the last two points in the table then,
so hmmm looking at Fred's graph, let's pick two points on the line, say 0,0 the origin and 8,2
now, for Sam, let's use the last two points in the table then,
Answer:
The rate at which both of them are moving apart is 4.9761 ft/sec.
Step-by-step explanation:
Given:
Rate at which the woman is walking, = 3 ft/sec
Rate at which the man is walking, = 2 ft/sec
Collective rate of both, = 5 ft/sec
Woman starts walking after 5 mins so we have to consider total time traveled by man as (5+15) min = 20 min
Now,
Distance traveled by man and woman are and
ft respectively.
⇒
⇒
As we see in the diagram (attachment) that it forms a right angled triangle and we have to calculate .
Lets calculate h.
Applying Pythagoras formula.
⇒
⇒
Now differentiating the Pythagoras formula we can calculate the rate at which both of them are moving apart.
Differentiating with respect to time.
⇒
⇒
⇒ ...as
⇒ Plugging the values.
⇒ ...as
ft/sec
⇒ ft/sec
So the rate from which man and woman moving apart is 4.9761 ft/sec.
