I just answered this.... :]
x - 0.05x = 57,
0.95x = 57,
57/0.95 = original price
Original price = $60
Exponential equation is
y=a(b)ˣ
when b>1, it is growth
when 0>b>1, it is decay
so
we want the 2nd number to be more than 1
that would be the 3rd one, y=3(8)ˣ
2/3 x 5 = 3
the ratio from 4 to 20 is 5, then you multiply it by the original amount
so it's 3
F(x) = 4.x2 +1 is the answer.
you might have to google search because i can barley see the table
