Problema Solution
A new cell phone battery fully charged can last for 8 hours of use. When in standby mode, the battery continuously loses 7.5% of its charge daily. How much charge will be left in this battery after a week on standvby and after a month on standby? Find the exponential function, then evaluate.
Answer provided by our tutors
A new cell phone battery fully charged can last for 8 hours of use. When in standby mode, the battery continuously loses 7.5% of its charge daily.
Then charge left in the phone battery=(100-7.5x)%,where x=No. of days
After a week charge left in the battery=(100-7.5*7)%=47.5%
After a month charge left in the battery=(100-7.5*30)%=-125% i.e negative so no charge will be left