2. What is the circumference of
this circle?
Radius
=
Circumference =
7 m

circumference

=

43.98cm

Step-by-step explanation:

C

=

2

π

r

where:

C

=

circumference

r

=

radius

To find the circumference, substitute your known values into the equation:

C

=

2

π

r

C

=

2

π

(

7

)

C

=

14

π

C

≈

43.98

126.66 m²

step-by-step explanation:

the pertinent area formula is a = πr², where r is the radius.

here, a = π(6.35 m)² = 40.32π, or approximately 126.66 m²

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.