Tina counts $26$26 heart beats over a $20$20 second interval.
How many groups of $20$20 seconds are in $1$1 minute?
What is Tina's heart rate in beats per minute (bpm)?
A pulse was recorded beating at $17$17 times per $15$15 seconds. How many beats per minute is this?
A pulse was recorded beating at $38$38 times per $30$30 seconds. How many beats per minute is this?
A pulse was recorded beating at $11$11 times per $10$10 seconds. How many beats per minute is this?