Luke rides his bike 20 miles in 4 hours. if he rides at a constant speed, select the answers here that are equivalent ratios to the speed he rides. a: 30 miles in 7hrs b: 25 miles in 6 hours c: 10 miles in 1 hr d. 15 miles in 3 hrs

D. 15 miles in 3 hrs because he bikes 5 miles per hour (20 divided by 4=5)

< 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⭐

22 dimes and 9 nickels

step-by-step explanation: