I need help asap
Please answer it asap

Step-by-step explanation:

given,

radius (r)=2.6cm

now, area of sphere (a)= 4×pi×r2

or, a = 4×22/7×2.6^2

so, area = 84.9828 cm^2is answer.

hope it will help uh

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.