The frog population at a lake doubles every three weeks. the population can be modeled by f(x)=15(2)^x and f(6)=960. what does the 15 represent?
a- the population after six weeks
b- the starting population
c- the rate the population increases
d- the number of weeks that have passed

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles

The average number of vehicles waiting in line to enter a parking lot can be modeled by the function f left parenthesis x right x squared over 2 left parenthesis 1 minus x right parenthesis endfraction , where x is a number between 0 and 1 known as the traffic intensity. find the rate of change of the number of vehicles waiting with respect to the traffic intensity for the intensities (a) xequals0.3 and (b) xequals0.6.

If f(x)=-x^2+6x-1 and g(x)=3x^2-4x-1,find(f+g)(x)