How do you calculate 0.1240965 divided by 4000 times 100% on a ti83 plus calculator?

True or false: the revolution of the earth creates day and night as it rotates around the sun

When you jump from an elevated position you usually bend your knees upon reaching the ground. by doing this, you make the time of the impact about 10 times as great as for a stiff-legged landing. in this way the average force your body experiences is a) less than 1/10 as great. b) more than 1/10 as great. c) about 1/10 as great.d) about 10 times as great.

In science and physics what is the standard unit of measure for speed?