Human fingernails grow out of average rate of 3.47 mm per month how much will they grow in 20 months

6.94cm

Step-by-step explanation:

we just need to set up a simple expression

20(3.47)

we can use a calculator to solve

this equals 69.4mm

it is also equivalent to 6.94cm

< coa = 150 ( given)

as ba and bc are tangents

so oc and oa is perpendicular to cb and ab respectively because in circle normal passes through centre

so in quadrilateral oabc

< coa + < oab + < ocb + < abc = 360

150 +90+90 + < abc = 360

330 + < abc = 360

< abc = 360 -330 = 30

so < abc = 30

⭐dhruv⭐

30

step-by-step explanation:

idk

i hope i