How many times can 12 go into 804 and how many remainder is left

For what values of b will f(x)= logbx be a decreasing function? (16 )

The equation respenting the left table is

Apool measures 100 meters by 100 meters a toddler inside the pool and trows a ball 60 centimeters from one edge of the pool. how far is the ball from the opposite edge of the pool