199 + 200 = 399
199 and 200 is the pair.
The passenger train is going 120MPH and the freight train is traveling 40MPH
Answer: 32 2/19°F
Step-by-step explanation:
Since the temperature was 52° and dropped to 38°, the difference will be:
= 52° - 38°
= 14°
Therefore, 14° was dropped in 4¾ hours. Therefore, the temperature dropped pee hour will be:
= 14/4¾
= 14 / 19/4
= 14 × 4/19
= 56/19
= 2 18/19° per hour.
In 2 hours, the temperature dropped will be:
= 2 18/19° × 2
= 5 17/19°
With the above explanation, the temperature after 2 hours will then be:
= 38° - 5 17/19°
= 32 2/19°F
The temperature will be 32 2/19°F.
Everything is divided by 2
The curve

is parameterized by

so in the line integral, we have





You are mistaken in thinking that the gradient theorem applies here. Recall that for a scalar function

, we have gradient

. The theorem itself then says that the line integral of

along a curve

parameterized by

, where

, is given by

Specifically, in order for this theorem to even be considered in the first place, we would need to be integrating with respect to a vector field.
But this isn't the case: we're integrating

, a scalar function.