Proposition 2.30. suppose x and y are topological spaces, and f : x → y is any map. (a) f is continuous if and only if f (a c f(a) for all asx. (b) f is closed if and only if f (a) 2 f(a) for all a cx. (c) f is continuous if and only if f -(int b) ) for all b cy. (d) f is open if and only if f-'(int b) 2 int f-'(b) for all b c y.

Which graph represents an even function?

Which of the following lines does not intersect the line y=-2x+3 ? a) y=2x b) y=2x-3 c) y=2x+3 d) y=-2x-3

Lv beethoven software supplies customized software to a managed healthcare system. lv beethoven software's costs for the software is $1,723,000. lv beethoven software sells the software to the healthcare system for $3,816,981.10. overhead expenses are estimated at 47% of the selling price. what is lv beethoven software's net profit to the nearest dollar?