Describe each step taken to solve the equation. Then, check the solution to see if it is valid. If it is not a valid solution, e
1 answer:
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Answer:
The equation for the curve is:
Step-by-step explanation:
We know that for a curve defined as:
y = f(x)
The slope of the curve at the point x is:
y = f'(x)
where f'(x) = df(x)/dx
Here we know that we have a function that passes through the point (0, 7)
We also know that the slope of the curve at every point is twice the value of the y-coordinate. (remember that the y-coordinate is given by f(x))
Then we have two equations:
f(0) = 7
f'(x) = 2*f(x)
From the shape of the equation, we can assume than this is an exponential equation like:
Replacing that in the second equation, we get:
From that equation, we can conclude that k = 2
Then:
Now we can use the first equation:
f(0) = 7
With this, we can find the value of A.
Then we can conclude that the equation for the curve is:
Answer:
And since we know the surface area 326.7 in^2 we can solve for the value of r like this:
And replacing we got:
And the best answer would be:
5.1 in
Step-by-step explanation:
For this case we need to use the formula for the surface area of a sphere given by:
And since we know the surface area 326.7 in^2 we can solve for the value of r like this:
And replacing we got:
And the best answer would be:
5.1 in