Answer:
The number of years it will take for Francesca to grow 6 inches is 12 years
Explanation:
The height to which Francesca is growing, Δh/Δt = 1/2 inch per year
The number of years, 'Δt', it will take her to grow 6 inches given as follows;
Δh/Δt = 1/2 inch/year
Δh = 1/2 inch/year × Δt
When Francesca grows 6 inches, we have;
Δh = 6 inches
∴ Δh = 6 inches = 1/2 inch/year × Δt
6 inches = 1/2 inch/year × Δt
Δt = 6 inches/(1/2 inch/year) = 12 years
The number of years it will take for Francesca to grow 6 inches, Δt = 12 years