Lynn paid $12.21 for ribbon. The cost per yard was $1.48. How many yards of ribbon did Lynn buy? wngldih

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

k2s for potassium sulphide