Not very good with this stuff, needed

1k = 1000m, so we divide 13.5m/s by 1000 and it is 0.0135. Then 1h = 3600s, so we multiply 0.0135km for 3600 and it gives 48.6.

Step-by-step explanation:

We just adjust the measures dividing the meters by the kilometers and multiplying the seconds for the hour. I know that 1h = 3600 seconds so the velocity in one second is 3600 major in an hour, of course dividing the meters by the kilometer value 1000 to balance the operation.

answer: ur mum is gay

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional