A student makes a cross-section clay model to represent the internal structure of a volcano that leads to the formation of two rock (x and y). The student records the processes that affect the type of rock that is formed in a table. Which processes causes the rock formed at location x to be different from the rock formed at location Y

powerful computers now, not then

if the person is shown to have +90n, then ans is -10n.

if the person is shown to have -90n, then ans is +10n.

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