Answer:
B) 7
Step-by-step explanation:
Let the number be x
4x + 12 = 40
4x = 40 -12
4x =28
x = 28/4
x = 7
Ah is derived from h^2. it's derivative is 2h^2-1, thus the constant a = 2
b is derived from bh. where it's derivative is h^1-1, thus the constant b = 1
That’s what i got
step by step explanation