190867 Mechanics and Thermodynamics Test 1 (chapters 1 6)

Here are two vectors:    a→=(4.0m)i^−(3.0m)j^\vec{a}=(4.0m)\rm{\hat{i}} - (3.0m)\rm{\hat{j}} b→=(6.0m)i^+(8.0m)j^\vec{b}=(6.0m)\rm{\hat{i}} + (8.0m)\rm{\hat{j}} What are (a) the magnitu...