What repeated addition equals to 3/4

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Given that ot =5, xt=12, and ox= 13 is xy tangent to circle o at t? explain.

Pepe and leo deposits money into their savings account at the end of the month the table shows the account balances. if there pattern of savings continue and neither earns interest nor withdraw any of the money , how will the balance compare after a very long time ?

The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16