What is the acceleration?

a. –0.4 m/s2

b. –0.2 m/s2

c. 0.2 m/s2

d. 0.4 m/s2

see earlier

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