02/21/23
calculus question!
Let f(x)=1/2x^2+3. Find the open intervals on which f is concave up (down). Then determine the x-coordinates of all inflection points of f.
1.
f is concave up on the intervals
2.
f is...
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02/21/23
The operating potential difference of a light bulb is 120 V. The power rating of the bulb is 75 W. Find the current in the bulb and the bulb's resistance.
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02/21/23
A potential difference of 9.0 V produces a current of 0.75 A in a piece of copper wire. What is the resistance of the wire?
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