Let’s discuss the question: how long is 129 minutes in hours. We summarize all relevant answers in section Q&A of website 1st-in-babies.com in category: Blog MMO. See more related questions in the comments below.

## How many hours is 1 hour 45 minutes?

To convert time to just hours:

45 minutes is 45 minutes * (1 hour / 60 minutes) = 45/60 hours = **0.75 hours**. 45 seconds is 45 seconds * (1 hour / 3600 seconds) = 45/3600 hours = 0.0125 hours. Adding them all together we have 2 hours + 0.75 hours + 0.0125 hours = 2.7625 hours.

## What is 120 minutes expressed in hours?

For example, 120 minutes equals **2 hours** because 120/60=2.

### Time Conversion (Hours | Minutes | Seconds) Math – Tutway

### Images related to the topicTime Conversion (Hours | Minutes | Seconds) Math – Tutway

## How long is 1 minute exactly?

The minute is a unit of time usually equal to 160 (the first sexagesimal fraction) of an hour, or **60 seconds**.

## How many hours is 15 minutes?

Therefore, 15 minutes = 15/60 hour = **¼ hour**.

## What decimal of 10 hours is a minute?

Minutes | Decimal Hours |
---|---|

9 | 0.150 |

10 |
0.167 |

11 | 0.183 |

12 | 0.200 |

## What is 1 hour and 20 minutes as a decimal?

Time | Hours | Minutes |
---|---|---|

01:00:00 | 1 hr | 60 min |

01:10:00 | 1.167 hrs | 70 min |

01:20:00 | 1.333 hrs |
80 min |

01:30:00 | 1.5 hrs | 90 min |

## How many hours are in one hour?

An hour (symbol: h; also abbreviated hr) is a unit of time conventionally reckoned as **1⁄24 of a day** and scientifically reckoned as 3,599–3,601 seconds, depending on conditions. There are 60 minutes in an hour, and 24 hours in a day.

## How long is a second?

Since 1967, the second has been defined as exactly “the duration of **9,192,631,770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium-133 atom**” (at a temperature of 0 K and at mean sea level).

## Why does a minute have 60 seconds?

THE DIVISION of the hour into 60 minutes and of the minute into 60 seconds **comes from the Babylonians who used a sexagesimal (counting in 60s) system for mathematics and astronomy**. They derived their number system from the Sumerians who were using it as early as 3500 BC.

### Who decides how long a second is? – John Kitching

### Images related to the topicWho decides how long a second is? – John Kitching

## How do you say 45 minutes in English?

At minute 45, we say it’s “**quarter to**” the next hour. For example, at 5:45, we say it’s “quarter to six” (or 15 minutes before 6:00). At minute 30, we say it’s “half past”. So at 9:30, we would say it’s “half past nine” (or half an hour after 9:00).

## What time is 5p in military time?

Regular Time | Military Time |
---|---|

3:00 p.m. | 1500 or 1500 hours |

4:00 p.m. | 1600 or 1600 hours |

5:00 p.m. | 1700 or 1700 hours |

6:00 p.m. | 1800 or 1800 hours |

## What is .08 of an hour?

Minutes | Tenths of an Hour | Hundredths of an Hour |
---|---|---|

48 | .8 | .80 |

49 |
.8 |
.82 |

50 | .8 | .84 |

51 | .8 | .85 |

## What time will it be 3/4 hour?

Three fourths of an hour is **45 minutes**.

## What is the decimal for 45 minutes?

Minutes | Decimal Conversion |
---|---|

45 | 0.75 |

46 |
0.77 |

47 | 0.78 |

48 | 0.80 |

## How do you write 45 minutes as a decimal?

Answer: 45 minutes in decimal is **0.75**.

## What is 30 minutes in decimals?

Decimal Hours

Using our 7:30 example above, we intuitively know that 30 minutes is ‘**half an hour**. ‘ In decimal format one-half is expressed as ‘. 5’. So in decimal format this is expressed as 7.5 hours (7 and a half hours).

## How long is a day?

Day Length

On Earth, a solar day is **around 24 hours**. However, Earth’s orbit is elliptical, meaning it’s not a perfect circle. That means some solar days on Earth are a few minutes longer than 24 hours and some are a few minutes shorter.

### How to Calculate Hours Worked in Excel

### Images related to the topicHow to Calculate Hours Worked in Excel

## How many seconds are in a year?

one year would equal 365 times 24 times 60 times 60 seconds…or **31,536,000 seconds**!

## How did we get 24 hours in a day?

Our 24-hour day comes from the ancient Egyptians who divided day-time into 10 hours they measured with devices such as shadow clocks, and added a twilight hour at the beginning and another one at the end of the day-time, says Lomb. “Night-time was divided in 12 hours, based on the observations of stars.

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