Question 34
Ventilation devices clean the air in the bar. The air flow rate for the first device changes according to the $f(t)=2^{t}$ formula, and the $f(t)=2^{t+3}$ for the second. In the bar, they have four devices of the first type and one of the second type. $S$ How many ventilation devices with flow $f(t)=2^{t+2}$ could you replace the existing ones?