18.) the cost of textbooks for a school increases with the average class size. identify the independent and dependent quantity in the situation.

a.) number of classes; average class size

b.) cost; number of classes

c.) average class size; cost

d.) cost; average class size

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

probably .5

i can on others if necessary.

yes   because as the functions are graphed they eventually will intersect unless otherwise

step-by-step explanation: