1) Sam wants to buy a new camera, and decides on the following rating system: Image quality – 50%
Battery life – 30%
Zoom Range – 20%
Camera A gets 8 out of 10 for Image Quality, 6 for battery life and 7 for zoom range.
Camera B gets 9 for Image Quality, 4 for battery life and 6 for zoom range.
Which camera is the best?

Sam decides to buy the Cony.

Step-by-step explanation:

Weighted mean for Cony: = 7.2

Weighted mean for Sanon: = 6.9

d. vertex

step-by-step explanation:

step-by-step explanation:

12: 00 p.m. to 7: 00 p.m. is a total of 7 hours.

4: 00 p.m. to 7: 00 p.m. is a total of 3 hours.

this means that from 4: 00 p.m to 7: 00 p.m. this represents 3/7 of what was lost from 12: 00 p.m. to 7: 00 p.m.

after knowing this, after doing 11,600 - 6,800 = 4,800

4,800 represents 3/7 of what was lost for 7 hours.

we then divide 4,800 by 3 which gets 1,600.

because we know that 1,600 represents 1/7 of how much water was lost, we just have to multiply by 7, which gets 11,200.   after adding 11,200 to how much water was left at 7: 00 p.m. which was 6,800. 11,200 + 6,800 = 18,000

this means that the pool originally had 18,000 gallons in the pool.

you can also check your work by doing 18,000 - 4(1600), which becomes           1800 - 6400 which gets you 11,600.