An ant crawled 2/7 of a journey at an average speed of 5 cm per minute. It crawled the remaining 25 cm at another speed. If the average speed for the whole journey was 7 cm per minute, what’s the amount of time for the whole journey? ___ minutes

Identify the theory that can be used to explain each phenomenon. answers diffraction: wave theory interference: wave theory reflection: both particle and wave theories refraction: both particle and wave theories

Gather reliable information to brent make his decision. to gather this information, use newspapers, call insurance companies or look at their web sites, and review consumer magazines and web sites. also, look at the manufacturer web site or for information about gas mileage. list the sources you use and take notes.

Ascientist wants to test ways to reduce pollution in lake . what is the bestway of doing this