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))

What kind of bond pays interest which is exempt from tax?

Someone answer this asap rn for ! a discount store’s prices are 25% lower than department store prices. the function c(x) = 0.75x can be used to determine the cost c, in dollars, of an item, where x is the department store price, in dollars. if the item has not sold in one month, the discount store takes an additional 20% off the discounted price and an additional $5 off the total purchase. the function d(y) = 0.80y - 5 can be used to find d, the cost, in dollars, of an item that has not been sold for a month, where y is the discount store price, in dollars. create a function d(c(x)) that represents the final price of an item when a costumer buys an item that has been in the discount store for a month. d(c(x)) =

Clarence wants to buy a new car. he finds an ad for a car that costs 27,200 dollars. suppose his local sales tax is 7%. -how much would he have to pay? -what is the cost of the car including tax? -if clarence has 29,864 saved, can he pay cash to buy the car?