A train traveling at 100 km an hour takes 3 seconds to enter a tunnel and an additional thirty seconds to pass completely through it. Find the length, in kilometers, of the train. Express your answer as a common fraction

Length of the train=1/12 km

Step-by-step explanation:

The train took 3 seconds to disappear into the tunnel travelling at 100 km/h

It means, the train travelled its length in 3 seconds.

Length of the train can be calculated thus

Length of the train=speed ×time

=100km/hr * 3/3600

=300 / 3600

=30 / 360

= 1 / 12 km

part a

x     y

0     8

1     7.5

2     7

3     6.5

4     6

5     5.5  

for every hour i deducted .5 inches from the length of the candle

part b

it is a function because for every x value there is only one y value

part   c

for every x value there is only one y value

x       y

0       8

1       7.6

2       7.2

3       6.8

step-by-step explanation: