# Simplify (2x2y)-3 (3x-3y3)39)  Simplify (2x2y)-3 (3x-3y3)   40)  A square has a side of 5 x 1067. Find the perimeter and area of the square. Make sure your final answer is in scientific...

Simplify (2x2y)-3 (3x-3y3)

39)  Simplify (2x2y)-3 (3x-3y3)

40)  A square has a side of 5 x 1067. Find the perimeter and area of the square. Make sure your final answer is in scientific notation.

thilina-g | College Teacher | (Level 1) Educator

Posted on

39) (2x2y)-3(3x-3y3)

I am assuming you have indicated.

`(2x^2y)^(-3) (3x-3y^3)`

`= (3x-3y^3)/(2x^2y)^3`

`= (3x-3y^3)/(8x^6y^3)`

`= ((3x)/(8x^6y^3) - (3y^3)/(8x^6y^3))`

`= (3/(8x^5y^3) - 3/(8x^6))`

Therefore, `(2x^2y)^(-3) (3x-3y^3) = 3/8(1/(x^5y^3) - 1/x^6)`

40)

one side of square  `a = 5 xx 10^7`

Perimeter `= 4 xx a`

`= 4 xx 5 xx 10^7`

`= 20 xx 10^7`

`= 2 xx 10^8`

Area        `= a^2`

`= (5 xx 10^7)^2`

`= 25 xx 10^14`

`= 2.5 xx 10^15`

horseslover004 | Student, Grade 9 | (Level 2) eNoter

Posted on

39)  Simplify (2x^2y)-3 (3x-3y^3)

40)  A square has a side of 5 x 1067. Find the perimeter and area of the square. Make sure your final answer is in scientific notation.

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