You design a new app for cell phones. Your revenue for x downloads is given by f(x) = 3x Your profit is $20 less than 70% of the revenue for x downloads. Create a function p to model the
profit. Find the profit for 100 downloads.
A) p(x) = 0.7. f(x) - 20, p(x) = 230
B) p(x) - 0.7•(x) + 20, p(x) = 190
C) p(x) = 0.7• f(x) +20, p(x) = 230
D) p(x) = 0.7•f(x) - 20, p(x) = 190

  the   balanced   equation   for   reaction of   ca metal   with   o2 to   produce   cao   is as below

2 ca+ o2→ 2 cao2

  explanation

the reaction is   balanced     since the   number of atoms   in reactant side is   equal to   number of atoms   in   product side.   for   example   they   are 2   atom of   ca in   reactant   side   and   2   atoms of ca   in   the product side.

  the   process   is a   meet the   requirement   of   redox   reaction because :     calcium   is   oxidized   from   oxidation state 0   to 2+   while   oxygen   is reduced from   oxidation   state   0   to 2-