Asphere with radius 1 m has temperature 18°c. it lies inside a concentric sphere with radius 2 m and temperature 25°c. the temperature at a distance r from the common center of the spheres satisfies the differential equation below. if we let s = dt/dr, then s satisfies a first-order differential equation. solve it to find an expression for the temperature t(r) between the spheres.

The expression will be T=7r

Explanation:

From equation S=dT/dr, we can solve this equation by integrating it and usig the values 25C and 18C for T and 2 and 1 for the radius. The solution to the integration will result in the value for S. For this example, it will be 7. Therefore, the main expression will be T= 7r in which the temperature is in fuction of the radius between the spheres.

i'm pretty sure it is letter c.) car

what is the average time it took the car to travel 0.25 meters?

⇒ 2.23 seconds

what is the average time it took the car to travel 0.50 meters?

⇒ 3.13 seconds