Car travels from 10mi to 30 mi in .40 hr. how fast are they going?

We will use our famous distance formula:

d = r x t.

Then, rearranging this formula, gives:

t = d/r

Now, t(for 1st 10 mi) = 10/30 = 1/3 hr.

And, t(for 2nd 10 mi) = 10/50 = 1/5 hr.

So, the total time = 1/3 + 1/5 hr.

Rearranging our distance formula again, gives: r = d/t

Now, r(average) = d(total)/t(total)

So, r(average) = 20/(1/3 + 1/5).

After simplifying, we get:

r(average) = 37.5 mi/hr.

Explanation:hope this helps!!!

an adaptation is a change or process by which an organism takes to be better suited for its environment. for example; migration is a behavioral adaptation, this is needed because birds are not built to last extremely cold climates. there are different adaptations because there are different species needing to adjust to different things, bears don't migrate; they hibernate.

explanation: