Q: Answer this question:

what hindu author is credited with the development of the decimal system??

A: al-Khwarizmi


Q: Answer this question:

when do we celebrate international father's day??

A: third Sunday of June


Q: Answer this question:

when did oxygen start to accumulate in the atmosphere??

A: around 2.45 billion years ago


Q: Answer this question:

the cause of water scarcity in cape town??

A:
drought