1. use the given circle. find the length s to the nearest tenth a. 3.1 in. b. 15.7 in. c. 31.4 in. d. 5.0 in 2. he draws a tile, replaces it, and draws another tile. what is the probability he will draw a blue tile on both draws? a. 2/35 b. 1/9 c. 16/225 d. 2/21

Part 1) Find the length s to the nearest tenth

we know that
[length of a circumference]=2*pi*r
for r=3 in
[length of a circumference]=2*pi*3> 18.84 in

if 2*pi radians (full circle) has a length of> 18.84 in
 (5*pi/3) radians> x
x=(5*pi/3)*18.84/(2*pi)> x=15.7 in

the answer Part 1) is 
15.7 in

Part 2) What is the probability he will draw a blue tile on both draws?

we have a bag of 5 red tiles, 3 yellow, 4 blue and 3 green
total tiles > 15

4 blue out of 15
1st draw is 4/15 
2nd draw is 4/15
(4/15)*(4/15)> 16/225

the answer Part 2) is
16/225 

D.  x = 4.

Step-by-step explanation:

As the 2 angles are congruent:

2.3x +25 = 5.8x + 11

2.3x - 5.8x = 11 - 25

-3.5x = -14

x = 14/3.5

x = 4.