Mathematics: The monthly cost for 50 minutes of calls is $14.01 and the monthly cost for 79 minutes is $17.78. what is the monthly cost for 73 minutes of calls?

The monthly cost for 50 minutes of calls is $14.01

Ответ:

chris4212

18.01.2022

$\bf \begin{array}{lllll}
&x_1&y_1&x_2&y_2\\
% (a,b)
&({{ 50}}\quad ,&{{ 14.01}})\quad 
% (c,d)
&({{ 79}}\quad ,&{{ 17.78}})
\end{array}
\\\quad \\\\
% slope = m
slope = {{ m}}= \cfrac{rise}{run} \implies 
\cfrac{{{ y_2}}-{{ y_1}}}{{{ x_2}}-{{ x_1}}}

\\ \quad \\\\
% point-slope intercept
y-{{ y_1}}={{ m}}(x-{{ x_1}})\qquad \textit{plug in the values and solve for "y"}\\
\qquad \uparrow\\
\textit{point-slope form}$

find the slope, or "rate of change", then plug those values in the
point-slope form and solve for "y", to get the equation of that line,

how much is it for 73 minutes? well, make x = 73, and to get "y" :)

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Ответ:

kristieroth1

06.01.2020

Mathematics

1921.67

1922 to the nearest whole number

Step-by-step explanation:

Cylinder

V = pi*r^2 * h

pi = 3.14

r = d/2

r = 12/2

r = 6

h = 13

V = 3.14 * 6^2 * 13

V = 1469.52

1/2 Sphere

V= 2/3 * pi * r^3

r = 6

pi = 3.14

V = (2/3) 3.14 * 216

V = 452.2

Total Volume

V_tot = 452.2 + 1469.52

V_tot = 1921.67

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The monthly cost for 50 minutes of calls is $14.01 and the monthly cost for 79 minutes is $17.78. what is the monthly cost for 73 minutes of calls?

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