Final answer:
In the given scenario, the equation provides the total weight of a filled box. When t equals 1 or 2, the box weighs 382.5 and 515 grams respectively. And for the box to weigh 2,900 grams, it would need approximately 20 t-shirts.
Step-by-step explanation:
The equation w=250 + 132.5t represents the total weight of a filled box with 't' t-shirts, where each t-shirt weighs 132.5 grams and the empty box weighs 250 grams. If we substitute t=1, we get w=382.5 grams, meaning a box with one t-shirt would weigh 382.5 grams. Alternatively, for t=2, w=515 grams, so a box with two shirts would weigh 515 grams.
Considering the equation 2,900=250 + 132.5*t, we first subtract 250 from both sides to get t on one side: 2650=132.5t. Dividing by 132.5 then gives t~20, meaning that approximately 20 t-shirts are needed to make the box weigh 2,900 grams in this scenario.
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