Hey there,
Your question states: <span>How did the calculation of pi help mathematicians during the Gupta period?
My best guess that I would give would be the option B. </span><span>
The value of pi helped them explain that Earth is a rotating sphere. Because they used the </span>

to help them, just as we use that in math.
Hope this helps.
~Jurgen
<span>The same rights as all other citizens of those states.
Hope This Helps!!!</span>
Answer:
ecological validity.
Explanation:
Ecological validity: The term ecological validity is defined as the limit or extent to which a particular findings of specific research study can be generalized into real-life settings. If the ecological validity of a particular study is considered to be high then it is believed that the behavior being recorder from the research can be applied in day to day life and it signifies that the result is considered to be as useful.
In the question above, the approach emphasizes the ecological validity.
Answer: A. no later than 30 minutes after sunset and until at least 30 minutes before sunrise.
Explanation: Driving is guided by rules and driving rules may differ from one state to another. However, in California, in a bid to ensure that drivers and motorist have a clear vision or sight of their path, drivers behind the wheel must turn on their headlights no later than thirty minutes after sunset and until at least 30 minutes before sunrise.
Answer:
Explanation:
Kwame Nkrumah
Ghanaian pan-africanist and the first Prime Minister and President of Ghana (1909-1972)