If the average grade of an english class rose from 70 to 85, what is the approximate percent increase?

answer choices

the percent increase is 14%.
the percent increase is 17%.
the percent increase is 21%.
the percent increase is 35%.

85 - 70 = 15

15/70 = 0.21428571428

Round to .21

Move decimal over twice to the right

21%

The percent increase is 21%.

Step-by-step explanation:

Given,

The original average grade = 70,

New average grade = 85,

Total changes in the average grade = New average grade - original average grade

= 85 - 70

= 15

Since,

⇒ The approximate percent increase is 21 %.

answer: d. $20

step-by-step explanation:

just took the test

< 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⭐