6. The planet Earth weighs 6.6 x 1021 tons. Write this number in standard notation.

7. Venus is 67,000,000 miles from the sun. Write this number in scientific notation.

to find the perimeter of the rectangle this is the expression:

x-9+x-9+3x-4+3x-4=138

if we simplify it:

8x-26=138

remember, 138 is what it all adds up to

the length is 11.5cm

the width is 57.5cm

the area is 661.25cm^2

the answers might not be correct use at own risk