42. A toy store's percent of markup is 45%. A model train costs the store $100. Find the markaup.
(First gets brainliest)

$68.97

Step-by-step explanation:

The equation you have to use is I=p(1.45)

If you have a 45% increase to 100, the original price was $68.97.

225x²+4=0

225x²=0-4

225x²=-4

x²=-4/225

x=±√-4/225

$450 i think. hope this ☺