Question

1 a stopwatch reads 2:20.58. how many seconds is this? (the stopwatch reads 2 minutes and 20.58 seconds. to convert minutes to seconds, multiply by 60) a 220.58s b 140.58s c 120.58s d 22058s question 2 (1 point) a merry - go - round makes 24 revolutions during a 3 - minute ride. its rotational speed in rpm is 8 revolutions per minute true false

Explanation:

Step1: Convert minutes to seconds

Since 1 minute = 60 seconds, for 2 minutes, we have $2\times60 = 120$ seconds.

Step2: Add remaining seconds

We add the 20.58 seconds to the converted - seconds. So the total number of seconds is $120 + 20.58=140.58$ seconds.

For the second question:

Step1: Calculate rotational speed

The rotational speed in RPM (revolutions per minute) is calculated by dividing the total number of revolutions by the total number of minutes. Given 24 revolutions in 3 minutes, the rotational speed $v=\frac{24}{3}=8$ RPM.

Answer:

1. B. 140.58s
2. True