C because 5.26 x 10^3 is 5260
The greatest common factor of 21 and 40 is 1
To find the distance between her home and her latest position:
According to the question, the diagram is,
Consider the right triangle,
AB=120 km
BC=50 km
To find AC:
Using Pythagoras theorem,

Hence, the distance between the new position and her home is 130 km.
It is 3.9 I hope this will help you
Yes, 5 goes into 100 exactly 20 times because 5 multiplied by 20 is 100