Which measurement is most accurate to describe the weight of a quarter?

630 g
63 mg
6.3 g
0.63 kg

Find the measurement of angle b in the following triangle

For what values of a is the sum of the fractions 2a−1 / 4 and a−1 /3 positive?

Enter your answer and show all the steps that you use to solve this problem in the space provided. write a list of steps that are needed to find the measure of ? b .