Vector a is 2. 80 cm long and is 60. 0° above the x-axis in the first quadrant. Vector b is 1. 90 cm long and is 60. 0° below the x-axis in the fourth quadrant. Use components to find the magnitude and direction of a) a+b; b) a-b; c) b-a. In each case, sketch the vector addition or subtraction and show that your numerical answers are in qualitative agreement with your sketch.

Scientists observed a rock stratum and discovered some fossils. the image shows the fossils they discovered. what can you interpret from the image? an illustration showing layers rock with fossils embedded in some rock layers1. the dinosaur and the mammoth existed after the trilobites.2. the dinosaur and the armored fish existed before the trilobites.3. the trilobites and the armored fish died before the dinosaur.4. the trilobites and the armored fish were born after the dinosaur.5. the early mammoth is older than the trilobites.