Một thấu kính hội tụ có tiêu cụ f=20cm tính độ tụ của thấu kính

Complete the statement about memory improvement. ( )involves organizing and breaking down information into easier groups to expand capacity. rehearsal is the verbal repetition of information. these techniques are especially important for the improvement of ( ) memory.

True or false graphs must include scales that increase by the same amount

What’s #16 asking me and how do i solve it?