David_Scherfgen ( 923 Award_star_gold_2 )

Member Since Jan 15, 2013
By David_Scherfgen ( 923 Award_star_gold_2 )
453 Donations
2.413,00 € Raised
87.99% Funded
   Please Donate! / Bitte spenden!The Derivative Calculator / Ableitungsrechner and the Integral Calculator / Integralrechner are offered to you absolutely for free. I have spent countless hours designing, programming and testing these calculators (esp...
Categories Education, Science and Technology
By David_Scherfgen ( 923 Award_star_gold_2 )
10 Donations
$74.00 Raised
8.22% Funded
   Please Donate! / Bitte spenden!Keeping the Derivative Calculator / Ableitungsrechner, the Integral Calculator / Integralrechner and other websites running costs me about $900 per year for server rental and domain prolongation. Of course, this does n...
Categories Education and Science