One hour after yolanda started walking from x to y, a distance of 45 miles, bob started walking along the same road from y to x. if yolanda's walking rate was 3 miles per hour and bob's was 4 miles per hour, how many miles had bob walked when they met? ]

When bob starts walking The distance between them is 45-3 = 42 miles If they meet at time t then Yolanda would have walked X/3 minutes and Bob would have walked (42-X)/4 mins X/3 = (42-X)/4 so X = 18 Bob would have walked 42-18 = 24 miles.

We know that

Object A is 1.3 cm long> 1.3*10> 13 mm long
Object B is 130 mm long

then 
Object B is 10 times longer than Object A

Statement
1) The lengths are equal.> is false
Object B > Object A

2) Object B is 10 times longer than object A. > is true
Object B=10*Object A

3)Both measurements are less than 1 meter.> is true
1 m> 1000 mm
Object B (130 mm) < 1000 mm
Object A (13 mm) < 1000 mm

4)You can convert millimeters to centimeters by dividing by 100> is false
You can convert millimeters to centimeters by dividing by 10

therefore

the statement that are true
 1) Object B is 10 times longer than object A
 2) Both measurements are less than 1 meter