Start time 10: 50 a. m elapsed time swim 20 minutes snack 14 minutes

Start: 10:50 am

Plus the 20 minutes would be 11:10 am

11:10 am plus the 14 minutes would be 11:24 am

The end time is 11:24 a.m.

And the elapsed time would be a total of 34 minutes

< 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⭐

answer is the third choice:

3x^5+4x^4+x^3+2x^2-10x-7=0

step-by-step explanation: