FoHS 3.01 Roman Numerals and the 24 hour clock

Roman Numerals of 21

Answer explanation

The Roman numeral for 21 is XXI. In Roman numerals, X represents 10 and I represents 1. To form the numeral for 21, we combine two X's (10 + 10) and one I (1), resulting in XXI.

Tags

CCSS.4.NBT.A.2

A certified nursing assistant must deliver lunch meals to 15 patients. If it takes 7 minutes to deliver each meal, what time should she begin serving lunch if all patients need to be served by 1230? (in military time)

Answer explanation

To ensure all 15 patients are served by 12:30, we need to calculate the total time required to deliver the meals. It takes 7 minutes per patient, so 15 patients x 7 minutes = 105 minutes. To find the starting time, subtract 105 minutes from 12:30 (1230 in military time), which gives us 10:45 (1045 in military time). Therefore, the nursing assistant should begin serving lunch at 10:45.

Tags

CCSS.3.MD.A.1

An occupational therapist begins his day with an hour-long patient briefing at 0900, followed by 4 new patient evaluations that take approximately 45 minutes each. He allots 15 minutes to document his evaluation findings for each patient. What time will this occupational therapist complete his duties? (in military time)

Answer explanation

The occupational therapist starts at 0900 with a 1-hour briefing, which ends at 1000. Then, he conducts 4 evaluations, each taking 45 minutes, totaling 180 minutes or 3 hours. This brings the time to 1300. He also spends 15 minutes documenting each evaluation, totaling 60 minutes or 1 hour. Adding this to 1300, he completes his duties at 1400.

Tags

CCSS.3.MD.A.1

A radiology technologist sees her first patient at 0800 and has 10 patients scheduled for diagnostic images today. If it takes 15 minutes to evaluate each patient and 10 minutes to clean the equipment after each patient, what time will the radiology technologist complete her duties? (In military time)

Answer explanation

The radiology technologist starts at 0800 and has 10 patients. Each patient takes 15 minutes for evaluation and 10 minutes for cleaning, totaling 25 minutes per patient. Multiplying 25 minutes by 10 patients gives 250 minutes. Converting 250 minutes to hours and minutes (4 hours and 10 minutes) and adding it to the starting time (0800) results in a completion time of 1210 in military time.

Tags

CCSS.3.MD.A.1

An athletic trainer must be on the football field to cover practice at 1600. If it takes 1 hour to treat and tape athletes before practice and an additional 45 minutes to load and take the water coolers to the practice field, what time will he need to arrive at work? (In military time)

Answer explanation

To determine the time the athletic trainer needs to arrive at work, we need to add the time it takes to treat and tape athletes (1 hour) and the time it takes to load and take the water coolers to the practice field (45 minutes). Since the practice starts at 1600, we subtract 1 hour (60 minutes) and 45 minutes from 1600, which gives us 1415 as the time the trainer needs to arrive at work.

Tags

CCSS.3.MD.A.1

A physical therapist works with 6 patients before her lunch break at 1200. If she spends 20 minutes with each patient and allows herself 10 minutes after each patient for documentation, what time will she need to begin work in the morning? (in military time)

Answer explanation

The physical therapist spends 30 minutes (20 minutes with the patient and 10 minutes for documentation) with each patient. So, for 6 patients, she will need 180 minutes or 3 hours. Therefore, if she has her lunch break at 1200, she needs to start working at 0900 to be able to see all 6 patients before lunch.

Tags

CCSS.3.MD.A.1

Roman Numeral of 38

Answer explanation

The question asks for the Roman Numeral of 38. The correct answer is 'XXXVIII'. In Roman numerals, X represents 10, V represents 5, and I represents 1. So, 3 X's (30), 1 V (5), and 3 I's (3) together make 38.

Tags

CCSS.4.NBT.A.2

Roman Numeral of 550

Answer explanation

The Roman numeral for 550 is 'DL'. In Roman numerals, D represents 500 and L represents 50. When combined, they form 550. Therefore, the correct option is 'DL'.

Tags

CCSS.4.NBT.A.2

Roman Numeral of 6

Answer explanation

The question asks for the Roman Numeral of 6. The correct answer is 'VI'. In Roman numerals, V represents 5 and I represents 1. When I is placed after V, it adds to the value, making it 6. Therefore, the Roman numeral of 6 is 'VI'.

Tags

CCSS.1.NBT.A.1

Roman Numeral of 219

Answer explanation

The question asks for the Roman Numeral of 219. The correct answer is 'CCXIX'. In Roman numerals, C represents 100, X represents 10 and I represents 1. So, 200 is represented as CC, 10 as X and 9 as IX. When combined, it forms 'CCXIX' which is the Roman numeral for 219.

Tags

CCSS.1.NBT.A.1