Answer:
<u>=-26.7</u>
Step-by-step explanation:
=-13.9+(-12.8)
=-13.9-12.8
<u>=-26.7</u>
Answer:
You will have 40 mins before 100%
Step-by-step explanation:
First the person with a flashlight and one of his friends cross the bridge. After that same person with a flashlight comes back and leads another friend to the other side. Finally he comes back again and leads the last of them.
Number of times that he will have to cross the bridge is 5 ( five ).
Answer:
C = 2√(Aπ).
Step-by-step explanation:
The area A = π r^2 where r = radius
and the circumference = 2 π r.
From the formula for the area r = √(A / π)
So the circumference is found by substituting in C = 2 π r for r:
C = 2 π √(A / π)
C = 2√(Aπ).