Astriped marlin can swim at a rate of 70 miles per hour. is this a faster or slower rate than a sailfish, which takes 30 minutes to swim 40 miles? show your work.

Let's do the work shall we

this is going to be a ratio problem.

Striped Marlin:
70 miles/ One hour (Or 60 minutes)

Sailfish:
40 miles/ 30 minutes.

Since 30 minutes is only one half of 60 minutes, all we have to do is multiply the sailfish ratio by 2 in order to receive the correct mph.

(40miles/30 minutes) x2 = (80 miles/60 minutes(or one hour)).

Therefore, the sailfish is faster! 80 miles per hour is faster than the 70 mph marlin.