The polynomial for the total electricity generated is _ (Type your answer using exponential notation.)

849x²+109x+24615

Explanation:

Total electricity produced:

→  -17x² +181x + 14453+866x²-72x+10162

group the term like this ↓

→ - 17x²+866x²+181x-72x+14453+10162

same thing here ↓

→ 17x²+866x²+181x-72x+24615

add and subtract terms ↓

→ 849x²+181x-72x+24615

final result will appear like this ↓

→ 849x²+109x+24615

10000

step-by-step explanation: divide by 2,

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: