Which expression calculates the time in hours an object takes to travel 38 miles at a speed of 2 m/h ?
A. 38·2
B. 38/2
C. 38-2
D. 38+2

How long would it take to travel 198 km at the rate of 36 km/h ?
A. 5.5h
B. 162h
C. 234h
D. 7128h

Respuesta :

Answer:

B

A

Step-by-step explanation:

Answer:

B. 38/2

A. 5.5h

Step-by-step explanation:

For the first question we use the formula for velocity:

[tex]v=\frac{d}{t}[/tex]

where [tex]d[/tex] is the distance and [tex]t[/tex] is time, and we clear for time:

[tex]t=\frac{d}{v}[/tex]

thus, if the object travels a distance of 38 miles, at a velocity of 2m/h, the time it takes is:

[tex]t=\frac{38}{2}[/tex]

which is option B.

For the second question we do the same, the difference is that now we have a distance of 198km at a velocity of 36km/h, the time must be:

[tex]t=\frac{198km}{36km/h}=5.5h[/tex]

the time is 5.5 hours which is option A.