Answer:
https://youtu.be/wOH_gVtidns
I recorded a video of myself explaining it hope it helps ;)
Step-by-step explanation:
70 cm
ex:
100 cm in a meter
so you’d do 100-30 cm
and that equals 70 centimeters
F(x) - g(x) = -2x^3 - 6x^2 + 9x
Step-by-step explanation:
Exponential function is given by general form 
Where a and b are constants.
say a=1 and b=2 then we can write function as :

or 
To graph this or any exponential function, we just need to find some points then join them by a curved line.
Like plug x=0, 1, 2,... into above function and find points:
plug x=1

Hence point is (1,2)
Find more points similarly then graph them to get the graph as shown below: