As a unit rate, 137.5 miles in 2.5 hours would be

137.5 miles in 2.5 hours would be a "rate". To find the "unit rate", you would divide 137.5 by 2.5, to see how many miles you could go every ONE hour.

137.5/2.5 = 55

After dividing 137.5 miles/2.5 hours by 2.5, you end up with 55 miles/1 hour, so your unit rate is 55 miles per hour (mph).

Unit rates are rates that are constant; it is the value of the ratio.

21.4 i did it already for s1

step-by-step explanation:

< 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⭐