Acircle with area 25pi has a sector with a central angle of 9/10pi radians. what is the area of a sector? either enter an exact answer in terms of pi or use 3.14 for pi and enter your answer as a decimal rounded to the nearest hundredth.

11.25 pi

Step-by-step explanation:

Pi is 180 degrees, a circle is 360 degrees, 9/10's of 180 is 162, and divide that by the full 360 which is .45. Then, multiply that by 25 and you have 11.25 pi is the area of that sector.

her fastest speed is at the one hour because she is going at 3 miles a hour.

Step-by-step explanation:

1:3= 3 miles per hour

2:5= 2.5 miles per hour

3:7= 2.3 miles per hour

4:9= 2.25 miles per hour

so the greatest number of miles per hour is in hour one with 3 miles per hour.

happy to help :)