The area of a circle is equal to 1 dm². find the radius of the circle.

The radius of the circle is 0·564 dm

Step-by-step explanation:

Area of a circle is  

3·1416

r   Radius

so , 1 dm²

3·1416 × 1 dm²

Divide the 3·1416 both the side

1 ÷ 3·1416 dm²

0·3183 dm²

r 0·564 dm

so , The radius of the circle is 0·564 dm

step-by-step explanation:

one of the most important purposes of surface treatment is to alter surface properties according to the requirement of specific applications. for example, hydrophobic coating has been utilized on windshield and eyeglasses. gold atom monolayer on substrate has become a popular surface bioconjugation strategy.  

step-by-step explanation:

the true ones are a b and d