Answer:
13.8
Step-by-step explanation:
the required constant can be calculated as:

according to the formula above:

B, and a student who spent 5.5 hours online would have a mood rating of about 2.
Answer:
density = 5 g/ml
Step-by-step explanation:
d=m/v
d= 100/20
Answer:
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Answer:
x-7>0
Straight answer: x-7
Step-by-step explanation:
Assuming that the timber is X cm long and 7cm was cut off, there remaining amount is x - 7cm. In order for 7cm to be cut off, the timber must have been > 7cm long => x > 7 => x - 7 > 0