The Fair Labor Standards Act was passed to stop child labor
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The answer is - Sunspots.
Sunspots are dark in appearance, but only on a visible light, and this is due to the fact that they are much cooler than the surrounding areas, but that doesn't mean by any means that the sunspots are cool, on contrary, they are very hot too. Sunspots actually are storms that appear in the lower atmosphere of the sun.
Answer:
1. Participants are randomly assigned to intervention or control
Explanation:
Quasi-experimental study -
It is the study to estimate the impact of an intervention on the target population with any random assignment .
This Quasi-experimental research shares , the similarities with the randomized controlled trial or the traditional experimental design .
But in this study , there is random assignment for the control or treatment .
Hence , from the options given in the question , the correct is ( 1 ) .
Answer
Car used 2.31 liters of fuel to travel 100 km
Explanation:
We have given distance s = 100 km
We know that 1 mile = 1.609 km
So 100 km = 
Fuel efficiency of car means mileage of car = 26.9 MPG ( mile per gallon )
We have to find the how many liters of fuel used in going 100 km
So amount of fuel used 
= 
So car used 2.31 liters of fuel to travel 100 km