3 Ariana spends a total of 56 min exercising. She walks for 11 min to warm up and then runs at a constant rate of 9 min per mile for the rest of the time. Ariana says that she ran 5 miles. Is she correct? Explain your reasoning.

Ariana is correct.

Step-by-step explanation:

56 - 11 min to warm up = 45 mins of running

9 min per mile*5 miles = 45 mins of running

Ariana is correct because of the work shown above.

Hope this helps!

d. bc = 12 and ef = 16

step-by-step explanation:

we are given that δabc : δdef such that .

also, it is given that

so, from the options, we need that .

a.

b.

c.  

d.

as, we can see that only option d gives the same ratio as i.e. .

hence, the possible lengths are bc = 12 and ef = 16.

42

step-by-step explanation:

256/6=42