The mean is 100 and the standard deviation is 15. What percent of the population falls between: 1) 85 and 115
2) 70 and 130

CORRECT ANSWER ONLY PLEASE EXPLAIN

1. 68%; 2.95%

Step-by-step explanation: Search up standard deviation distribution. If it is "normally distribitued," the percentage of data in each standard deviation interval increases by a certain percentage, for the first one one standard deviation from the mean is 68%, and two is 95%. This is always true if the data is "normally distributed."

< 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⭐

walter needs to make at least 5 more cookies but no more than 40. 5 ≥ x ≥ 40;

step-by-step explanation:

walter has to make a minimum of 20 cookies. he already has 15 cookies made, so he must make 5 more to meet the minimum.

the maximum amount of cookies he can make is 55. he already has 15, so he has to make no more than 40 more cookies to meet the maximum.