There are 70 students in a school band . 40% of them are sixth graders , 20% of them are seventh graders , and the rest are eighth graders . what percentage of the band members are eighth graders?

40% of the band members are eighth graders.

Step-by-step explanation:

There can only be a total of 100%.  The problem already gives us the percentages of sixth graders and seventh graders, and it tells us that there are only eighth graders left.  Subtract the sum of 40 and 20 from 100 to get your answer.

100% - (40% + 20%) = 40%

answer: 590

step-by-step explanation:

answer: hence, function will be

explanation:

since we have given that

cost of a new textbook = $85

according to question, the resale value of a textbook decreases by 25% with each previous owner,

so, our function becomes,

here, y is the total value of the text book after x owners.

hence, function will be