Asolid metallic sphere of radius a carries total charge q. no other charges are nearby. the electric field just outside its surface is keq/a2 radially outward. at this close point, the uniformly charged surface of the sphere looks exactly like a uniform flat sheet of charge. is the electric field here given by σ/ε0 or σ/2ε0? . σ. ε0. σ. 2ε0.

The center of a circle represent by the equation (x+9)^2+(y-6)^2=10^2 (-9,6), (-6,9), (6,-9) ,(9,-6)

Someone answer asap 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)) =

Rewrite the following quadratic functions in intercept or factored form. show your work. y = 4x^2 - 19x- 5