Answer: 21.32
Step-by-step explanation: To figure out how many more cans each student needs to bring, we can use the following equation:
(total number of cans needed) - (number of cans collected) = (number of cans each student needs to bring) x (number of students)
So, plugging in the values we know, we get:
1,000 - 403 = x * 28
Simplifying the equation:
597 = 28x
Dividing both sides by 28:
x = 21.32
This means that each student needs to bring about 21 more cans (rounded up) to reach the goal of 1,000 cans.