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Kwesi is putting on sunscreen. He uses 3ml to cover 45 cm2 ​​ of his skin. He wants to know how many milliliters of sunscreen g he needs to cover 240 cm2 ​​of his skin. He assumes the relationship between milliliters of sunscreen and area is proportional.

Respuesta :

spnickoloff
16 ml. If you set 3/45 = x/240 where x is the amount he needs for 240ml^2, then cross multiply and divide to find x you get 16
calculista

Answer:

The answer is [tex]16\ ml[/tex]

Step-by-step explanation:

we know that

He uses [tex]3\ ml[/tex] to cover [tex]45\ cm^{2}[/tex] ​​ of his skin

so

by proportion

Find how many milliliters of sunscreen are needed to cover  [tex]240\ cm^{2}[/tex]

[tex]\frac{3}{45}\frac{ml}{cm^{2}} =\frac{x}{240}\frac{ml}{cm^{2}} \\ \\x=240*3/45\\ \\ x= 16\ ml[/tex]

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