It takes 3.5 minutes to upload 12 photographs from a smartphone to a computer and then an additional 1.25 minutes to upload the photographs to a website. at this rate, about how long will it take to upload 20 photographs from a smart phone to a computer and then to a website?

8 minutes.

Step-by-step explanation:

Time taken to upload 12 photographs from a smartphone to a computer = 3.5 minutes

Time taken to upload that 12 photographs from computer to a website = 1.25 minutes.

∵ The time taken for 12 photographs to upload from smartphone to a computer then to a  website = 3.5 + 1.25 = 4.75 minutes.

∴ The time taken for 1 photograph to upload to a website =

∴ Time taken to upload 20 photographs from a smartphone to a computer then to a website =  

                             = 7.916 ≈ 8 minutes.

It will take 8 minutes to upload 20 photographs.

7 ft 6 in means 7 1/2, because 6 in is 1/2 of a foot. 7 ft 8 in means 7 2/3 because 8 in is 2/3 of a foot. 23/3 = 7 2/3. 15/2 = 7 1/2.

23/3   *   15/2   = 57 1/2

step-by-step explanation: