Evaluate the function below given f(2) f(x)=3x-10
1 answer:
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Answer:
True
Step-by-step explanation:
So we know that:
And we are asked to verify whether f(2)=0 is true or false.
To determine the answer, substitute 2 for n in the function and solve. So:
Square and multiply:
Subtract:
So, the statement is indeed true.
And we're done!
Answer:
Light is moving at the speed = 77.78 km/min
Step-by-step explanation:
Given:
Distance between island and point P = 5 km
Moving along the the shoreline when it is 1 km from P.
So, x = 1
From the above statement light makes seven revolutions per minute.
Therefore,
Solution:
From the given figure.
Substitute x = 1
-------------------(1)
Now, first we differentiate both side with respect to t.
Using chain rule.
Substitute from equation 1.
Substitute
Applying cross multiplication rule.
Therefore, light is moving along the shore at the speed of 77.78 km/min
