a parabolic lamp is facing due east. The bulb (located at the focus) is 8 inches away from the vertex (located at the origin). t
1 answer:
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Answer:
3 1/8 inches
Step-by-step explanation:
For focus-vertex distance p, the equation of the parabola can be written ...
y = x^2/(4p)
Here, we have p=8. We want to find the value of y when x=10 (the radius of the dish). That is ...
y = (10^2)/(4·8) = 100/32 = 3 1/8
The dish is 3 1/8 inches deep.
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Answer:
It will take 11.9 years for the property value to double.
Step-by-step explanation:
The value of the land is modeled by the following equation:
In which P(t) is the value after t years, P(0) is the initial value and r is the growth rate, as a decimal.
In this problem, we have that:
How long will it take for property values to double?
This is t when . So
We have that:
So to find t, we apply log to both sides of the equality.
It will take 11.9 years for the property value to double.