* 3. Which of these is an example of sustainable development?
(1 Point)
ignoring the lights when they are switched on but not required
not wasting paper
using coal and petroleum deposits at a fast pace
none of these

Ithink it is space that makes up 70 percent

343^x = 49^4-xx = 4-xx+x=42x = 4x = 4/2x = 2therefore x = 2

The us is first  the  u.s. economy  remains the  largest in the world  in terms of nominal  gdp. however, the  u.s. economy  loses its spot as the number one  economy  to china when  measured  in terms of  gdp  based on ppp. in these terms, china's  gdp  is $23.19 trillion exceeds the  u.s. gdp  of $19.42 trillion