3. (a) let a be a nxn matrix whose column space is not equal to r". what can you say about the null space of a, n(a)? (b) if an nxn matrix a has a mull space that is not trivial (not the zero space), does ax b have a solution for any b in r"?

so what is the problem what are they asking you to solve

step-by-step explanation:

so what is the problem what are they asking you to solve

answer: the answer is 100 x 12,500, which is 1,250,000.

step-by-step explanation: emily solved for a part when she should have solved for the whole.  

875,000 should be the numerator of the equivalent ratio.  

70 x 12,500 is 875,000.