Given
The demand function

To determine:
a) The revenue function.
b) The marginal revenue.
c) The marginal revenue when x=200.
d) The equation of tangent, and its derivation.
Explanation:
It is given that,

a) The revenue function is given by,

b) The marginal revenue function is,

c) The marginal revenue when x=200 is,

Hence, the marginal revenue is 3.84.
d) Let y=mx+c is the tangent.
Then,

That implies, for y=12.68, and x=200,

Hence, the equation of tangent is,
Answer:
SIAPA YANG MAU JADI TEMENKU..
Step-by-step explanation:
YANG
(15x^3y^-8)÷(5x^2y^-4)
= 3xy^-4
(3x)/ y^4
The value of 4 in 524897123 is: 4,000,000
If this is correct the answer would be
y^2 + 0.1y + 0.0025