The charts above show the monthly production of tables and chairs at the three factories of Company w in 2009 and 2010. According to the charts, what was the percent increase in
Factory 2's monthly production of chairs from 2009 to 2010?

use this formula:

p(a\b) = p(a and b)/p(b).

take it from here.

let x be the money she spent so that she can earn the free t-shirt.

since, she already spent $112.49

⇒

also, as per the statement: jennifer must spend $250 or more in order to qualify for a free t-shirt at the store.

then,

we have an inequality i.,e

subtract 112.49 from both sides we get;

therefore, $137. 51 more money does jennifer need to spend so that she can earn the free t-shirt