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Trava [24]
3 years ago
9

How would you express 2.50 as a percentage

Mathematics
2 answers:
butalik [34]3 years ago
8 0
First, you would move the decimal place two places to the right. Then that would be your answer. For this case, the answer would be 250%.
bija089 [108]3 years ago
3 0

To express any number as a decimal, just multiply it by 100 .

Often, an easy way to do that is to move the decimal point
two places to the right.

           2.50  =  <em>250%</em>


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See below

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4.

For this question, I think you meant

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Once

\cos(\theta)=\dfrac{\vec{u_1} \cdot\vec{u_2}}{||\vec{u_1}||||\vec{u_2}||}

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and the norm of \vec{u_2} is ||\vec{u_2}|| = \sqrt{13^2 + 15^2} = \sqrt{169 + 225}= \sqrt{394}

Thus,

\cos(\theta)=\dfrac{76}{\sqrt{208} \sqrt{394}} = \dfrac{19}{\sqrt{13}\sqrt{394}}=\dfrac{19}{\sqrt{5122}}

\therefore \theta = \arccos \left(\dfrac{19}{\sqrt{5122}} \right)

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