Step-by-step explanation:

1.6(7)²

6(7)(7)

6(49)

=294cm

2.2(15×20)+(5×20)+(5×15)

2(300+100+75)

2(475)

=950inches

3.2(3.14×5×25)+2(3.14×5²)

2(392.5)+2(78.5)

785.39+157.07

=942.46

hindi kona alam yung 4 at 5 pero Sana nakatulong