If it is a rectangle then the sides of the width would be the same. Also with the sides of the length. So add the widths, 10+10=20. Subtract 20 from 90, 90-20=70. Divide 70 by 2, 70÷2=35.
The length would be 35 feet.
The value of the expression is
.
Solution:
Given expression:

<u>To find the value of the given expression:</u>
Using exponent rule: 


Using exponent rule: 


Since 


Hence the value of the expression is
.
3 × 
expressing as a whole number, using the digits available, we obtain
3
Now consider the position of the decimal point in the original 0.003
To get it back to where it should be we require to move the decimal point 3 places to the left , denoted by a negative exponent
0.003 = 3 × 
Well it would be 23.8 or 24