[QS] is a diagonal of a quadrilateral PQRS where PQ=3cm, QR=7cm, PS=5cm, and angle QRS=30degrees. b. φ (or Ø I’m not sure, but the line is vertical) =60degrees and angle QSR=theta:

(ii) find the exact length of [RS], given that theta is acute.

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:

a: inscribed angles

step-by-step explanation:

i reviewed this question with a peer and teacher, seems to be correct, me later