#### Answer

a) 6$\frac{1}{4}$
b)1$\frac{1}{2}$

#### Work Step by Step

two pieces of half inch pipe are 2$\frac{3}{8}$ and 3$\frac{7}{8}$
a) We have to find the total length of the two pieces
2$\frac{3}{8}$ + 3$\frac{7}{8}$ = $\frac{19}{8}$ + $\frac{31}{8}$
= $\frac{50}{8}$ = $\frac{25}{4}$ = 6$\frac{1}{4}$
b) She needs a total length of 4$\frac{3}{4}$
therefore cu off value will be 6$\frac{1}{4}$ - 4$\frac{3}{4}$
= $\frac{25}{4}$ - $\frac{19}{4}$
= $\frac{6}{4}$ = $\frac{3}{2}$
=1$\frac{1}{2}$