Aperson wishes to mix coffee worth $9 per lb with coffee worth $3 per lbto get 240 lbsof a mixture worth $5 per lbhow many pounds of the $9 and the $3 coffees will be needed?

care to share were the trapezoid shown is ?

answer:   28.56 feet (approx)

step-by-step explanation:

since, triangle abc has measure of angle c equal to 55 degrees, measure of angle abc equal to 90 degrees, and length of bc equal to 20 feet.

we have to find out the measurement of segment ab.

therefore, tan 55° =

but bc = 20 feet.

⇒ tan 55 ° =  

⇒ ab = 20 × tan 55 °

⇒ ab = 20 × 1.42814800674

⇒ ab = 28.5629601348   ≈ 28.56 feet