2. Sheldon was doing a science experiment about temperature. He first measured the temperature of some water and found it was 17°C. Then he put the water in the freezer and
recorded the temperature two hours later. It had fallen to -11°C. What was the change in
temperature in two hours?

Temperature dropped by 28°C in two hours

Step-by-step explanation:

Initial measurement:

Measurement 2 hours later:

The difference:

Temperature dropped by 28°C in two hours

if you are saying purchasing 3 social media ads and one newspaper ad counts as one purchase then there are:

6 purchases

if you are asking how many of each then:

18 social media ads

6 newspaper ads

cant open file sorry!

step-by-step explanation: