The percentage increase; you'll need to take the new value and subtract it by the old value. 
16 - 13 = 3
Next, you'll divide 3 by the original value. 
3 ÷ 13 = 0.23
And multiply by 100
The percentage increase of friends is 23%
 
        
             
        
        
        
Answer:
32.02
Step-by-step explanation:
The number that is in the hundredths place is five. You can remember this by knowing that the decimal point counts as one and all the number to the right of the decimal point count as zero. So 0 is in the tenths place, 1 is in the hundredths place, 5 is in the thousandths place, 6 is in the ten thousandths place and so on. So if you round this number to the nearest hundredth, you'll get 32.02 because if you're rounding a number and the number you're rounding with (knowing that the number you're rounding will always be rounded with the number to the right of it) is 5 or greater than 5, that number that you have to round will go up one unit. 
I hope this helped!
 
        
             
        
        
        
Para encontrar la medida de la circunferencia se aplica la ecuación P = π*D.
Explicación.
El perímetro es la medida total de todos los lados que pueda tener una figura geométrica, además se tiene que tener en cuenta que es una magnitud fundamental de los polígonos.
Para una circunferencia el perímetro se encuentra multiplicando el diámetro y el número π (pi), como se muestra a continuación:
P = π*D
Dónde:
P es el perímetro.
D es el diámetro
        
             
        
        
        
Answer:
Step-by-step explanation:
From the figure attached,
If the figures shown are congruent (Equal in shape and size), length of all the sides must be equal.
Therefore, sides sides CD and GH must be equal in measures.
Distance between the two points  and
 and  is given by,
 is given by,
d = 
Length of the side CD having ends C(-4, 4) and D(0, 5) will be,
CD = 
CD = 
      = 
Length of GH having ends G(0, -4) and H(4, -5) will be,
GH = 
       = 
       = 
Therefore, m(CD) = m(GH)
Similarly, we can prove all corresponding sides of two figures equal in measure.
This shows ABCD ≅ EFGH.
 
        
             
        
        
        
24-16x when using the distributive property.