Inkjet printers, the kind that most of us use, actually steer tiny drops of ink using electric fields! the drops of ink are given tiny electric charges and are propelled between metal plates 1.11 mm long, separated by a gap of 0.168 mm. if the electric field strength in the gap equals 2,510,000 v/m, what potential, v, in volts, must the printer circuits apply to the plates?

i think the answer is a, hope this : )

we have been given a quadratic function and we need to restrict the domain such that it becomes a one to one function.

we know that vertex of this quadratic function occurs at (5,2).

further, we know that range of this function is .

if we restrict the domain of this function to either or , it will become one to one function.

let us know find its inverse.

upon interchanging x and y, we get:

let us now solve this function for y.

hence, the inverse function would be if we restrict the domain of original function to and the inverse function would be if we restrict the domain to .

the old price per ounce is c/4.

the new price per ounce is c/3.6.

the ratio of the old price to the new one is

(c/4)/(c/3.6) = (c/c)×(3.6/4) = 0.9 . . = 9/10 . . "nine tenths" in either form