I need help pls , do not understand any of this

The sequences found are

1) 27

2) 0.00024414062

3) 1

4) 128

5) 1/162

Done

Step-by-step explanation:

1.

√1 = 1   square root

9^2 = squared

√81 = square root

6561/9= 729 divided

√729 square root  

= 27  answer

or 729^2 = 531441 squared answer

2.

0.25^2 = squared

0.0625 x 4  = multiplied

=  0.015625^2 = squared

= 0.00024414062 answer

3.

625 x 5 multiplied

125 / 5   divided

25 / 5 divided

5 /5 divided  (we divide again as there is a repeat + at 125 and 5 both would     mean divide.)

= 1  answer

4.

8 x 2       multiplied

16 x 2      multiplied

32 x 2      multiplied

64 x 2      multiplied

= 128 answer

5.

1/2  x 1/3  multiplied by 1/3 = 0.166

= 1/6 x 1/3  multiplied by 1/3 = 0.055

= 1/18 x 1/3 multiplied by 1/3 = 0.0185

= 1/54 x 1/3 multiplied by 1/3 = 0.00617

= 1/162 = 0.00617 x 1/3 = 0.002056

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.