What are you asking here i think it should be 20:100
We have been given the function 
We know that the range is set of y values for which the function is defined. Therefore, we will find the value for x and then observe the restriction is y's values.

Now, we know that logarithm function is not defined for negative values. Hence, the value for y is always greater than zero.
Therefore, the range of the function is given by y>0
B is the correct option.
It would decrease the price of tomatoes. As supply rises, demand lowers and the cost lowers with it.
15 cm, as 1 and 3 are too small, 75 is too big, and 15 is just average