Marie was trying to show her friend why -3 × -8 equals a positive product. this is what she wrote: -3 × 0 = 0 -3 × = 0 -3(8) + -3(-8) = 0 -24 + 24 = 0 what should marie write in place of the question mark? a. 8 + 8 b. -8 + (-8) c. 8 + (-8) d. -8 + 0

the answer would be c

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step-by-step explanation:

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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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