Christopher can pay $20 for one pair of shoes or $30 for two pairs of shoes. The marginal cost of the second pair of shoes is

10$

Explanation:

2 pairs of the 20$ would be 40$ while 2 pairs is 30$ for the other set so i think its 10.

I think $10, sorry if its not correct.

Explanation:

answer; /// multipotentialite means a person who have many different interests and creative pursuits in life; (one true calling);

polymath; means a person   of wide-ranging knowledge or learning;

scanner; means; a device that captures images from photographic prints,posters,magazine pages.ect;

answer; is the sum of all individual demands curves;