Astar is measured to be 18.9 light years from earth. what is the correct answer in the calculation shown below? (consider both significant digits and scientific notation.)

•• al and bert are jogging side-by-side on a trail in the woods at a speed of 0.75 m/s. suddenly al sees the end of the trail 35 m ahead and decides to speed up to reach it. he accelerates at a constant rate of 0.50 m/s2, while bert continues on at a constant speed. (a) how long does it take al to reach the end of the trail? (b) once he reaches the end of the trail, he immediately turns around and heads back along the trail with a constant speed of 0.85 m/s. how long does it take him to meet up with bert? (c) how far are they from the end of the trail when they meet?

The softest and hardest minerals are: softest hardest

The frequencies refer to the sample data collected from a population of interest when performing a hypothesis test comparing two or more population proportions.