A method which will not give the correct answer is simply doing 2.5 times 0.75
Answer:
Total length of the plant in week is [tex]\frac{19}{4} inches[/tex]
Step-by-step explanation:
Length of the small plant = [tex]2\frac{1}{2} inches=\frac{5}{2} inches[/tex]
Rate at which plant in growing = [tex]r=\frac{3}{4} inch/week[/tex]
Length of the plant increased in 3 weeks = x
[tex]x=r\times 3weeks=\frac{3}{4} inch/week\times 3weeks =\frac{9}{4} inches[/tex]
Total length of the plant = [tex]\frac{5}{2}inches+x[/tex]
[tex]\frac{5}{2}inches+\frac{9}{4} inches[/tex]
=[tex]\frac{20+18}{2\times 4} inches[/tex]
[tex]=\frac{38}{8} inches=\frac{19}{4} inches[/tex]
