Answer: (a) car exhaust; (b) chemicals and (d) people
Step-by-step explanation:
Indeed, it all starts from people. They are the ones who use the cars and make the pollution happen. It is also people who use chemicals to pan and find gold, for example, polluting rivers.
Answer:
D) 240 000 cm³
Step-by-step explanation:
V = 100cm×80cm×(80-50)cm
= 8000cm²×30cm
= 240 000 cm³
They simplify operations when the systems are not encumbered by the variables.
Answer:
63 flowers
Step-by-step explanation:
all you have to do is multiply 7 and 9
Answer:
-4/9
Step-by-step explanation:
