Use 3.14 as an approximation of π. Which is the area of a circle with a radius of 6cm? A. 18.84 cm^2
B. 28.26 cm^2
C. 37.68 cm^2
D. 113.04 cm^2
E. About 355 cm^2

D - 113.04cm²

Step-by-step explanation:

πr² (formula for area of a circle)

3.14×6²

= 113.04

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