Mark makes birdhouses for a living. the materials cost him $10.75 and the labor is $11 to make one birdhouse. he marks-up the cost by 25% to determine the selling price. what is the mark-up?

dc=6 square root of 3 and ac is 12 square root 3

c and d

step-by-step explanation:

square root of 3/2 = 18/c

cross multiply to get 18*2=√3*c

36/√3 * √3/√3 = c

c= 36*√3/3

c=12√3

r = 78539458390583095803458309458039485093485 or just 3

step-by-step explanation:

30 feet

step-by-step explanation:

that would be 2 1/2 * 12

= 24 + 6

= 30 feet   (answer)