Which development method is best explained in this way: developing a system through repeated cycles and smaller portions at a time, enhancing and evolving the system over time? Incremental method
Rapid prototyping method
Spiral method
Waterfall method

No, the only way you can mute the notifications is to disable notification sounds in the settings, the settings of your phone of

Function tipcalculate (slider, bill){  var tip = document.getelementbyid('tipamount');   var slideval = document.getelementbyid('slideval');   var bill = document.getelementbyid(bill).value;   var prcnt = slider * .01;       if (bill == null || bill == '') {      tip.innerhtml = ' enter an amount';       return false;   }  if(isnan(bill)) {      tip.innerhtml = ' enter a number';       return false;   }  if(bill > = 0){      tip.innerhtml = '$' + (bill * prcnt) .tofixed(2);   slideval.innerhtml = slider + '%';   }}

Power pointyou will use  power point  the option to create an urgent presentation using predesigned and preinstalled elements.i hope ^-^