Writing an equation with two variables hugh bought some magazines that cost $3.95 each and some books that cost $8.95 each. he spent a total of $47.65. let m represent the number of magazines and b represent the number of books. which equation models the situation? m + b = 47.95 m + b = 60.55 3.95m + 8.95b = 47.65 8.95m + 3.95b = 47.65

circumference divided by 3.141592654 then timesthe radius twice

step-by-step explanation:

circumference divided by 3.141592654 then timesthe radius twice

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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