Find á f(t) for f(t) = u(t)y(t). 2. consider the differential equation: (ty' (t) + y(t) = . what does u(t) need to be to make the right-hand-side a perfect derivative? 3. rewrite the differential equation above plugging in the chosen expression for u(t).

Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour from the time that she first checked her outdoor thermometer. by 6 a.m., the temperature had fallen 21 degrees. which expression can you use to find how many hours earlier she had first checked the thermometer?

1: 4 if the wew 35 surfboards at the beach how many were short boards?

Which expression is equivalent to (5x^7+7x^8) − (4x^4−2x^8)? a. 9x^8 + 5x^7−4x^4 b. 3x^8 + 7x^7 c. 12x^8 − 2x^4 d. 5x^8 + 5x^7 + 4x^4