Answer :

Sunnyxo
so a scientific notation is when the number is less than 10 and bigger or equal to 1 and you write the power of ten afterwards.
to solve this first you need to find the other side of the rectangle, the length. 
to do this you need to divide the area by the given width because area = width x length
so the length is 400 000 which is 4x10 5pw (pw is power (those little numbers up there)
so now all you need to do is to add these together and times it by 2
2(4x10 5pw + 6.2 x 10 6pw) 

so its 2(6600000) so its 13200000 so its 1.32x10 7pw 

Answer:

The perimeter is 1.32*10⁷ cm

Step-by-step explanation:

We know that the perimeter P of a rectangle is:

P = 2*(b*h); (I)

b is the length of the base of the rectangle (6.2*10⁶ cm);

h is length of the height of the rectangle;

We also know that the area A of a rectangle is:

A = b*h; (II)

In our problem A = 2.48*10¹², so, from (II), we can get h:

h = A/b = 2.48*10¹² cm²/6.2*10⁶ cm = 4*10⁵ cm;

Now we can replace this value in (I):

P = 2*(6.2*10⁶ cm+4*10⁵ cm) = 2*6.6*10⁶ cm = 1.32*10⁷ cm

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