Need help ASAP. 81x⁴=1

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

Let f(x)=2x and g(x)=2x. graph the functions on the same coordinate plane. what are the solutions to the equation f(x)=g(x) ?me asap

During a wright loss challenge your friend goes from 125 pounds to 100 pounds.what was the percent weight loss