The graph of which function is decreasing over the interval (-4, ∞o)?

Iwill make brain if you me correctly fill this out needs due today pls and send it back to me (click the link and you will get it)

Acertain population of bacteria demonstrates exponential growth doubles in size every 4 days. how long will it take the population to triple in size?

Suppose that sahil knows that 45 people with ages of 18 to 29 voted. without using a calculator, he quickly says then 135 people with ages of 30to 49 voted. is he correct? how might sohil have come up with his answer so quickly?