Given w= sqrt 2(cos( pi/4) + i sin (pi/4)) and z = 2(cos (pi/2 ) + i sin(pi/2)),

what is w- z expressed in polar form?

A. sqrt2 (cos(pi/4) + i sin(pi/4))

B. sqrt2 (cos(3pi/4) + i sin(3pi/4))

C. sqrt2 (cos(5pi/4) + i sin(5pi/4))

D. sqrt2 (cos(7pi/4) i sin(7pi/4))

the answer is d

hope this

i belive false if so your welcome if not well idk

8.75

how-to:

first, we need to find what we have to work with.

since i know that we have 7 (years) and 0.8 (inches), we can use these to solve and find the equation!

secondly, what you want to do, is see that we need to know how much growth out of the 0.8 inches he got in only 1 year, instead of 7 years.

let's try to divide.

7 ÷ 0.8 = 8.75