gloverfamily199
gloverfamily199 gloverfamily199
  • 19-12-2018
  • Mathematics
contestada

the function f(x) varies inversely with x and f(x)=0.5 when x =0.3. what is f(x) when x=2.4?

Respuesta :

frika
frika frika
  • 20-12-2018

Answer:

0.0625

Step-by-step explanation:

If the function f(x) varies inversely with x, then this function is of the form

[tex]f(x)=\dfrac{a}{x},[/tex]

where a is unknown number.

Since  f(x)=0.5 when x =0.3, then

[tex]0.5=\dfrac{a}{0.3},\\ \\a=0.5\cdot 0.3=0.15.[/tex]

Therefore, the function is

[tex]f(x)=\dfrac{0.15}{x},[/tex]

Now when x=2.4,

[tex]f(2.4)=\dfrac{0.15}{2.4}=\dfrac{15}{240}=\dfrac{1}{16}=0.0625.[/tex]

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