Estabeleça o dominio da função logaritima log (x-1)(-3x+0)

An astronaut drops a rock into a crater on the moon. the distance, d(t), in meters, the rock travels after t seconds can be modeled by the function d(t)0.82. what is the average speed, in meters per second, of the rock between 5 and 10 seconds after it was dropped?

Solve the system of equations. y= 2x y= x^2 - 15

Do you mind if you guys me with this question i’m on number 8