20-20=x what is x? i don't know me

Flourine is found to undergo 10% radioactivity decay in 366 minutes determine its halflife

About 70 percent of the earth's surface is water-covered, and about 96.5 percent of all earth's water is salt water. identify the watery feature on earth that is made of freshwater rather than salt water. a) bay b) glacier c) ocean d) sea it is not incomplete this is the true question

Use the table to identify the phase and phase changes of the elements under the given conditions. write the name of the substance, phase, or phase change