See picture for solution to your problem.
The unknown digit is 7 because 6.471 is greater than 6.470 and less than 6.48.

Solution:
Given expression is 
To find the inverse of y.
⇒ 
Do cross multiplication.
⇒ y = –6 × 3
⇒ y = –18
Inverse of y means reverse the function.
We know that inverse of y is
.
⇒ 
Hence, inverse of y is 
Answer:
144.44 yards
Step-by-step explanation:
The formula to find circumference is: C = π · d
Since we already have most of the factors figured out, we just replace them with what we have.
C = 3.14 · 46 yrds
144.44 = 3.14 · 46
30/54 =x/1,140
30*1140= 34200
34200/54 = 633.33
ANSWER:
Estimated- 633