For the functions latex: u\left(t\right)=6t-7u ( t ) = 6 t − 7 and latex: s\left(t\right)=t^2-4s ( t ) = t 2 − 4, what is latex: s\left(u\left(2\right)\right)s ( u ( 2 ) )?

  21

Step-by-step explanation:

Put the numbers where the letters are and evaluate.

  s(u(2)) = s(6·2 -7) = s(5) = 5² -4 = 21

its c or d   take a lucky guess my dude

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: