4 years ago

Rafael is going for a walk. He takes 4 hours to walk 6.4 miles. What is his speed?

Mathematics

2 answers:

velikii [3]4 years ago

8 0

Answer:

His speed would be 1.6 mph. Hope this helped! :)

cluponka [151]4 years ago

4 0

Answer:

Step-by-step explanation:

1.6

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The curve with equation y=e^2x/4+3e^x has one stationary point.find the exact value of the coordinates of this point

Softa [21]

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$\implies y'=\dfrac{2e^{2x}(4+3e^x)-3e^xe^{2x}}{(4+3e^x)^2}$
$\implies y'=\dfrac{8e^{2x}+3e^{3x}}{(4+3e^x)^2}$

Stationary points occur where the derivative is zero. The denominator is positive for all $x$ , so we only need to worry about the numerator.

$8e^{2x}+3e^{3x}=e^{2x}(8+3e^x)=0$

$e^{2x}>0$ for all $x$ , so we can divide through:

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3 years ago

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3 years ago

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natima [27]

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