2 (06.02 MC) Ellis is painting wooden fenceposts before putting them in his yard. They are each 7 feet tall and have a diameter of 1 foot. There are 11 fenceposts in all. How much paint will Ellis need to paint all the surfaces of the 11
fenceposts? Use 3.14 for it, and round your answer to the nearest hundredth. Provide an explanation and proof for your answer to receive full credit. (10 points)

259.05 ft²

Step-by-step explanation:

Surface area of a cylinder =  

(where r is the radius and h is the height)

Given:

Surface area of one fence post = (2 × 3.14 × (1/2)²) + (2 × 3.14 × 1/2 × 7)

                                                    = 1.57 + 21.98

                                                    = 23.55 ft²

Therefore, surface area of 11 fence posts = 11 × 23.55

                                                                    = 259.05 ft²

The answer is in the image 

Cost of 7 gallons=$24.50

Cost of 1 gallon=24.50/7=3.5

Cost of 15 gallons=15*3.5=52.5

Cost of 15 gallons will be $52.5

The answer is in the image 

The solution is in the following image

The answer is in the image 

The wood before starting =12 feet

Left wood=6 feet

Wood used till now=12-6=6 feet

Picture frame built till now= 6/(3/4)

=8 pieces

Therefore, till now 8 pieces have been made.

The answer is in the image 

The answer is in the image 

tip=18% of 75.45

     =18/100 * 75.45 = $13.581

Tip = $13.581