Answer:
A
Step-by-step explanation:
The velocity of a moving body is given by the equation:

Is the velocity is <em>positive </em>(v>0), then our object will be moving <em>forwards</em>.
And if the velocity is negative (v<0), then our object will be moving <em>backwards</em>.
We want to find between which interval(s) is the object moving backwards. Hence, the second condition. Therefore:

By substitution:

Solve. To do so, we can first solve for <em>t</em> and then test values. By factoring:

Zero Product Property:

Now, by testing values for t<1, 1<t<4, and t>4, we see that:

So, the (only) interval for which <em>v</em> is <0 is the second interval: 1<t<4.
Hence, our answer is A.
The anwer is 3. The volume of a cube is lwh. 3 x 3 x 3 = 27
Answer:
15x^2−14xy−8y^2−x−y
Step-by-step explanation:
Combine like units.
Divide 13 by 16. A fraction represents a division problem. 5/10 is 5 divided by 10 or 0.5 or 50%. Hope this helps
Answer:
uh where's the rest of the question?
Step-by-step explanation: