Math answer plz need help with this plz answer

31.4 m , 37.68m , 43,96in , 3.14 ,175.84 ft , 3.14 , 25 ft

Step-by-step explanation:

Circumference of circle(c)= 2πr or πd
a.
Given,
d=10m
Now,
C=πd
3.14*10
31.4 m
b.
Given,
r=6
Now,
C=2πr
2*3.14*6
37.68m
2.
Given,
d=14in
Now,
C=πd
3.14*14
43.96 in
I used 3.14 for value of π.
4. Given,
r=28ft
Now,
C=2πr
2*3.14*28
175.84 ft
I used 3.14 for the value of π.
5.
Given,
C=78.5 ft
Now,
C=πd
78.5/π=d
d=78.5/3.14
d=25 ft

y = 2x

step-by-step explanation:

if you divide each number in the sequence, you'll see that they all have a multiple factor of 2. each number in the series, and any other numbers which may continue, will be multiplied by 2. therefore, y is the next number in the sequence, and x is the current one, so, our formula will be y = 2x.