Most done in AC method show step by step work

1. 9x²+12x+4
2. 4x²-17x-15
3. 3x²+4x-15
4. -6x³+15x²+36x​

its the fourth option

$9.41

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:

17

step-by-step explanation:

51/3=17

thus 17 is your answer.