Answer: There are 24 traffic lights on Berry Boulevard.
Step-by-step explanation:
Since we have given that
Total length of road = 
Number of roads on every
= 2
So, According to unitary method,
In every
, number of roads = 2
In every 1 mile, number of roads = 
So, in every
the number of roads = 
Hence, there are 24 traffic lights on Berry Boulevard.
Answer:
D. 8.8
Step-by-step explanation:
As the pythagorean theorem.
A² + B² = C²,
5.4 × 5.4 + 7 × 7 = C²,
29.16 + 49 = C²,
78.16 = C²,
8.8 ≈ C
B^2 = a^2 - c^2
b^2 = 9^2 - 5^2
b^2 = 56
b = 7.5