Answer:
21/50 or 21:50
Step-by-step explanation:
1km = 1000m
That means one meter is equal to 1/1000 of a km.
420 meters is 420/1000 of a km which is equal to 42/100 = 21/50 or 21:50
Is it right?
Also can I have Brainiest

Scientific notation for above vLue is :
25 because 4(8)-7 = 32-7 = 25
Answer:
29
Step-by-step explanation:
Simplify the expression
step by step:
1.

2.

Now,
