Answer:

Step-by-step explanation:

where r is the radius.
The radius is 11 and theta(in radians) is pi so

( 1 - x/100)^20 = 3843/55550
Taking logs
20 log (1 - x/100) = log (3843/55550)
log ( 1 - x/100) = log (3843/55550) / 20 = -0.0580007
1 - x/100 = 10^-0.0580007 = 0.875
x / 100 = 1 - 0.875 = 0.125
x = 12.5 Answer
There ar eno decimal places in 3.2x0 because 0x anything is 0 and 3 decimal places in 0.77x1.6. You can juat count the amout of places and that is the answer unless 0 is in the problem.
The answer is 10mph because you divide 30 by 3hours. I hope this helps. Could I possibly get brainliest?