in details please

Question

John inserts a partially used battery into a portable electric fan. The percent of the battery’s total charge changes at a constant rate of – 2.4 % per minute as the fan is used. When the fan has been used for 7 minutes, the battery charge is 62.42% of its full capacity.

1-Define a formula that gives the percent of total possible battery charge, k, in terms of the number of minutes the fan has been used, t.

Answer 1

The battery looses charge at 2.4% per minute

If you start at 100% , fully charged, then 100 - 2.4(M) = R where M = minutes used and R = Remaining charge

From the above, what would be equivalent to “k” you mentioned?

What would be equivalent to “t” you mentioned?

David