Answer:
-.001t^3 -.03t^2 +.4t +1
which is the last box on the right hand side
Step-by-step explanation:
(-.005t^3 + .1t^2 - .3t +3) - (-.004t^3 + .13^2 - .7t +2) since this is a subtraction problem you need to distribute the subtraction sign to the second problem before simplifying
so it becomes ( .004t^3 - .13t^2m+ .7t -2) now you can combine things that are alike by grouping
(-.005t^3 + .004t^3) (.1t^2 -.13t^2) ( -.3t +.7t) (3-2)
-.001t^3 -.03t^2 +.4t +1
