What is the area (in square units) of the region under the curve of the function f(x)=x+3, on the interval from x=1 to x=3 ?

10 square units

Step-by-step explanation:

We want to find the area under the curve from x=1 to x=3.

We use definite integrals to find this area.

We integrate to obtain:

We evaluate the limits to get:

Therefore the area under the curve from x=1 to x=3 is 10 square unit.

54 km / hours

step-by-step explanation:

we need to convert seconds to hours

60 seconds = 1 minutes

60 minutes = 1hour

15 m         60 second   60 minutes

  * *         = 54000 meters/ hour

second     1 minute             1 hour

now we need to convert meters to km

1000 m = 1 km

54000 m       1 km

*   = 54 km / hours

hour               1000m

hard

step-by-step explanation: