SOLUTION: A compute manufacturer finds that when x millions of dollars are spent on research, the profit, P(x), in millions of dollars is given by P(x)=20+5log base 3 (x+3). How much should

Question 1111150: A compute manufacturer finds that when x millions of dollars are spent on research, the profit, P(x), in millions of dollars is given by P(x)=20+5log base 3 (x+3). How much should be spent on research to make a profit of 40 million dollars?
Found 2 solutions by MathLover1, ankor@dixie-net.com:
Answer by MathLover1(20850) (Show Source): You can put this solution on YOUR website!

if (million dollars)

millions

Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
A compute manufacturer finds that when x millions of dollars are spent on research, the profit, P(x), in millions of dollars is given by P(x)=20+5log base 3 (x+3). How much should be spent on research to make a profit of 40 million dollars?
:
= 40
= 40 - 20
= 20
=
= 4
the exponent equiv of logs
x + 3 =
x + 3 = 81
x = 81 - 3
x = 78 spent on research

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