Answer:
34'2" I think
Step-by-step explanation:
You just add them together and that was for the first part
Answer:
I think It's option (B) 45
Step-by-step explanation:
But I am not sure It's correct or not
I hope It's helpful
A)
145 - 5d
5d = 145, set equal
29 days to lay all the track
b)
5*19 = 95
145-95 = 50
After 19 days, they have 50 miles to go.
Answer:
Option (b) is correct.

Step-by-step explanation:
Given: 
We have too choose the correct simplification for the given statement.
Consider 
Using property of exponents,
We have,

Again applying property of exponents 
We have,

Simplify, we have,

we get,

Thus, 
Option (b) is correct.
For these u can use a caculator for all pretty much.