The correct answer is A. 20.2 s
Explanation:
The table shows there were three trials to measure how much time a toy car needs to move 1 meter on different surfaces. Now, to find the average time on a surface simply add the results of the three trials and divide this by number 3 (number of trials). The process to know the average time on dirt is shown below:
20 + 19.2 + 21.5 = 60.7 - Results of each of the trials
60.7 ÷ 3 = 20.2 s - Divide the total by the number of trials
This means the average time for the toy to move on dirt was 20.2s
Based on the above sources, the most economical to use is the hydroelectric, since there is a fast-moving current in the river. Also, it is the commonly used energy-generation process. For wind turbine, it would require a minimum of 8kph to power the wind turbine, in this case is not sufficient. Coal deposit is not likely an option because this has some environmental concerns. Solar is not also an option since the village frequently has rainy days.
D is false it would put less oxygen into the air
The cell grows , replicates its dna... I think that’s it sorry if I’m wrong
