The number N of bacteria in a refrigerated food is given by M(T)= 10T^2-20T+500, t is less than or equal to T, is less than or equal to 20 where T is the temp of the food in degrees celsius. When the foood is removed form the fridge, the temp of the food is given by T(t)=2t+2, 0 is less than or equal to t is less than or equal to 6 where t is the time in hours

find the composition N(T(t)) and interpret its meaning in context

find the time when the bacterial count reaches 1500