Ariel has 2.6 grams of zinc. What volume of the material does she have if zinc has a density of 7.13 g/cm3?

Equation : Density = mass / volume

= 2.6 / 7.13

= 0.3646563815

Explanation:

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see the picture for the vector

the magnitude of the vector by pythagorean theorem

r = √( (-10)^2 + (3)^2 ) = √109

magnitude = √109 units

the direction angle between vector and x-axis is

tan^(-1)(3/10) = 16.699

so the direction is approximately 16.7 degrees north of west