Given OPQRS and S = 40°, what is the measure of ZR? S
R
40°
Р
A. 140°
O B. 135°
C. 90°
O D. 105°
E. 40°
O F. Cannot be determined
HELP ASAP

the angles s and r are supplementary so 180 - 40 = 140

Step-by-step explanation:

hello,

b) 62.47% of the students are between 14 and 18 years old.

step-by-step explanation:

mean = 15 and standard deviation = 2

student between 14 to 18

formula used z-score

for age 14 , z score

using z-table , p(z> -0.5)=0.3085

for age 18 , z score

using z-table , p(z< 1.5)=0.9332

p(-0.5< z< 1.5)=0.9332-0.3085 = 0.6247

thus, 62.47% of the students are between 14 and 18 years old.

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step-by-step explanation: