Saving per cents

The first day I save 1 cent and every next day cent more.
How many I saved per year (365 days)?

Correct answer:

x =  667.95 eur

Step-by-step explanation:

$$\begin{gathered} a_1=0.01 \\ {a}_2=0.01\cdot 365=3.65 \\ x={\displaystyle \frac{a_1+a_2}{2}}\cdot 365={\displaystyle \frac{0.01+3.65}{2}}\cdot 365={\displaystyle \frac{13359}{20}}={\displaystyle \frac{13359}{20}}\text{ eur}=667.95\text{ eur} \end{gathered}$$

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Math student

why tho

3 years ago  Like

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