Question 350612
You have an equation that gives you an output of P with a given input T. 
You're given P and need to find T. 
Use the equation.
{{{P=17000 + 4500sin((pi*T)/52)}}}
{{{20000=17000+4500sin((pi*T)/52)}}}
{{{4500sin((pi*T)/52)=3000}}}
{{{sin((pi*T)/52)=2/3}}}
Find the angle (in radians) whose sine is 2/3.
{{{(pi*T)/52=0.7297}}}
Now solve for T.