Based on the data provided in Table $2\mathrm{.}6,$ what is the flow rate of customers from $9$:$00$ a$.$m$.$ to $9$:$45$ a$.$m

Note: Round your answer to $4$ decimal places.

Customer Time in Time out

$19$:$019$:$11$

$29$:$059$:$15$

$39$:$069$:$24$

$49$:$089$:$22$

$59$:$089$:$18$

$69$:$099$:$38$

$79$:$099$:$20$

$89$:$119$:$25$

$99$:$169$:$44$

$109$:$209$:$42$