Consider the surface S parametrized by the equations x = uv, y = u + v, z = u − v, where u^2+v^2<=4 (a) Find the surface area of S. (b) Identify the surface S and give its equation in rectangular coordinates

12cm

the answer is d

if im not mistaking its

step-by-step explanation:  

the equation is not included but the answer is (1.50, 2.00, 2.75)

step-by-step explanation:

this is a direct variation proportion. y = kx

y is the total amount due, k is the constant of variation, and x is the number of texts sent.

plug in the 3.20 and the 16 to solve for the "k". this is the constant of proportionality. it is the value that will not change.

3.20 = k(16). solving you get $.20 per text.

the equation would then be y = .20x