Gumawa ng tula na tungkol sa wika, 3 saknong na binubuo ng apat na taludturan

Given: circle a externally tangent to circle b. how many possible common tangents to circles a and b can exist? 2 3 4

Based on current rates the earths human population is expected to grow how much by 2050

The us and canadian governments are doing all of the following to combat environmental problems except a. encouraging the use of public transportation b. enacting clean water policies c. requiring emissions testing d. limiting animal populations in some regions