Question 42181
When 'x' units are sold, the price of each unit (p in $) is given by 
{{{p = 2^(-x) + 75}}}
or {{{p = 1/2^x + 75}}}


So when 2 units are sold, unit price i.e. price of each unit is ${{{p = 1/2^2 + 75}}} = $75.25.


So when 7 units are sold, unit price i.e. price of each unit is ${{{p = 1/2^7 + 75}}} = $75.01 (approx).


Try the others as above. The answers are $75 (approx) in both the case.