$($Hot Tubs$)$ What is the amount of Tubing used?

A$.645$

B$.650$

C$.600$

D$.590$

$($Hot Tubs$)$ How many model C should Blue Ridge Hot Tubs make?

A$\mathrm{.}28$

B$\mathrm{.}15$

C$\mathrm{.}12$

D$\mathrm{.}30$

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