Jamal needs to create a nitric acid solution which is less than 15% nitric acid. he begins with 12 fluid ounces of a 20% nitric acid solution in water and he adds 8 fluid ounces of water. does he need to add more water?

The gades foundation and hbm corporation are eager to donate generously to their favorite charities. the gades foundation donated $250 in the first month, and each month afterward their cumulative donation total increases by 100$ the hbm corporation donated $64, in the first month, and each month afterward their cumulative donation total increases by 75%. in which month will the hbm corporation's cumulative donation total first exceed the gades foundations' cumulative donation total?

15 points ! ~ see if you know the answer to both you!

What could explain what happened when the time was equal to 120 minutes