Find the center and radius of the circle with the equation:

center(5,-1)

radius 2

Step-by-step explanation:

circle equation (x-a)²+(y-b)² = r² has radius r and center (a,b)

a = -(-5), b = -(1)

center = (5, -1)

r = √4 = ±2

since radius length cannot be negative, r = 2

i need a picure

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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