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Gary mixes a solution using two types of concentration of salt: 0.70 gallons of 5% salt and 0.30

gallons of 22% salt.

What is the salt concentration of the mixed solution? Answer choices are rounded to the nearest

whole percent.

o

O 17%

o

63%

o

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step-by-step explanation:

c. (3,2,6) is the answer.

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:

the first option is the answer.