Please help me i’m am struggling hard on these questions !!!!

Mathematics

2 answers:

pochemuha3 years ago

8 0

Answer:

5. 6.

4 boys 8 boys 16 tires 4 tires

----------- = -------------- ---------------- = ---------------

7 girls 14 girls 4 cars 1 car

7. 8.

8 correct 40 correct 16 pearls 8 pearls

-------------- = ----------------- -------------- = --------------

10 total 50 total 20 opals 10 opals

9. 10 .

32 pencils 8 pencils 7 balls 21 balls

---------------- = ---------------- ------------- = -------------

8 erasers 2 erasers 9 bats 27 bats

neonofarm [45]3 years ago

4 0

Answer:

5. 14

6. 8

7. 40

8. 10

9. 2

10. 21

Step-by-step explanation:

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If you use your office computer 40 hours per week, and do not unplug the computer when it is not in use, how much carbon dioxide

dangina [55]

If you use a laptop: 9.25; a desktop with a CRT monitor: 55.51; a desktop with an LCD monitor: 46.26.

A laptop that is plugged up and turned off uses 0.001kw/hr of energy. Each kwh of energy produces, on average, 1.39 lbs of CO2. There are 24*7=168 hours in the week; subtract the 40 hour work week from this and we have 128 hours a week for 52 weeks a year:
0.001*128*52=6.656*1.39=9.25.

A desktop that is plugged up and turned off uses 0.004kw/hr of energy. A CRT monitor uses 0.002 kw/hr when turned off. This means we have:
(0.004*128*52*1.39)+(0.002*128*52*1.39)=55.51.

For a desktop and an LCD monitor, which uses 0.001 kw/hr of energy, we have:
(0.004*128*52*139)+(0.001*128*52*1.39)=46.26.

6 0

3 years ago

Two different box-filling machines are used to fill cereal boxes on an assembly line. The critical measurement influenced by the

defon

Answer:

0.1981

Step-by-step explanation:

See attachment for calculation