



 
Hi Jaylynn, Suppose the length of the ramp is $r$ feet then I get the diagram The ramp forms a right triangle and the sine of the $30^o$ angle is thus $\frac{3.5}{r}.$ But the sine of a $30^o$ angle is $\frac12$ and thus \[\frac{3.5}{r} = \frac12 .\] Threrfore $r = 2 \times 3.5 = 7$ feet. Penny  


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