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Sagot :
Question 1:
The diver speed is 25 feet for every one minute
So for 10 minutes, the diver would have been dived 25 × 10 = 250 feet
If the diver now is 200 feet below sea level, this means 10 minutes ago, the driver was 200 - 250 = -50 feet below sea level. The negative means the diver, in reality, wasn't below the sea level. The diver was 50 feet above the sea level.
Question 2:
The temperature after it drops 17° from 5° is 5 - 17 = -12°
Question 3:
Josie is spending more than what she has in the bank account, she will end up with an overdraft of 47 - 55 = -$8
Question 4:
'3' is an odd number, so Joe will lose 10 scores from his scores before tossing the '3'. The integer to describe this is -10 ⇒ (minus 10)
Question 5:
-12° + 25° = 13°
Question 6:
-45° + 92° = 47°
Question 7:
Five times colder than -4° = 5 × (-4) = -20°
Question 8:
The distance = 29028 - (-485) = 29028 + 485 = 29513 feet
The diver speed is 25 feet for every one minute
So for 10 minutes, the diver would have been dived 25 × 10 = 250 feet
If the diver now is 200 feet below sea level, this means 10 minutes ago, the driver was 200 - 250 = -50 feet below sea level. The negative means the diver, in reality, wasn't below the sea level. The diver was 50 feet above the sea level.
Question 2:
The temperature after it drops 17° from 5° is 5 - 17 = -12°
Question 3:
Josie is spending more than what she has in the bank account, she will end up with an overdraft of 47 - 55 = -$8
Question 4:
'3' is an odd number, so Joe will lose 10 scores from his scores before tossing the '3'. The integer to describe this is -10 ⇒ (minus 10)
Question 5:
-12° + 25° = 13°
Question 6:
-45° + 92° = 47°
Question 7:
Five times colder than -4° = 5 × (-4) = -20°
Question 8:
The distance = 29028 - (-485) = 29028 + 485 = 29513 feet
These are 8 questions and 8 answers.
Question 1) a deep sea exploring ship is pulling up a diver at the rate of 25 feet per minute. The diver is 200 feet below sea level. How deep was the diver 10 minutes ago?
Answer: 450 feet below see level ( -450 feet)
Explanation:
i) pulling up rate: 25 feet / minute
ii) number of feet ascended
iii) number of feet ascended in 10 minutes: 25 feet / minute × 10 minutes = 250 feet
iv) current deep: - 200 feet
v) deep 10 minutes ago: -200 feet - 250 feet = - 450 feet. Which means 450 feet below sea level.
Question2) if it is 5 outside and the temperature will drop 17 in the next six hours, how cold will it get?
Answer: - 12 (12 below zero)
Explanation:
i) Future temperaure = current temperature - decrease in temperature
ii) Future temperature = 5 - 17 = - 12, which means 12 below zero
Question3) Josie has $47 left on her checking account. If she writes a check for $55 what will Josie's balance be?
Answer: - $ 8 (she will owe 8$)
i) Balance = current balance - new checks
ii) Balance = $ 47 - $ 55 = - $8 (she will owe $ 8)
Question 4) Joe is playing a game with a regular die. If the number that turns up is even, he will gain 5 times the number that comes up. If it is odd, he will lose 10 times the number that comes up. He tosses a 3 express the results as an integer.
Answer: he will lose 30.
Explanation:
i) 3 is odd
ii) 1Therefore, the result is that he will lose 10 times the number that comes up
⇒ Loss = 10 × 3 = 30
Question 5) it will be -12 tonight. The weatherman predicts it will be 25 warmer by noon tomorrow. What will the temperature be by noon tomorrow?
Answer: 13
Explanation:
i) Current temperature: - 12
ii) Change foreseen: + 25 (increase)
iii) Foreseen temperature = - 12 + 25 = 13
Question 6) the average temperature at the South Pole is -45 F. The average temperature on the equator is 92 F. How much warmer is the average temperature on the equator than at the South Pole?
Answer: 137 F
Explanation:
i) Temperature at the South Pole = - 45F
ii) Temperature on the Equator = 92 F
iii) Difference in temperature = temperature on the Equator - temperature and the South Pole
iv) Difference in temperature = 92F - (-45F) = 92F + 45F = 137F
Remember the law of signs: ( - ) × ( - ) = +
∴ It is 137F warmer on the Equator than at the South Pole.
Question 7) Felix reported that the coldest day on record for his town was five times colder than yesterday's temperature, -4 c. What was the temperature of the coldest day on record in Felix's town?
Answer: - 20C
Explanation:
i) Yesterday's temperature = - 4°C
ii) Coldest day's temperature = 5 × (-4C) = - 20C
Conclusion: the coldest day's temperature is -20°.
Question 8) the elevation of mt. Everest is 29,028 feet. The elevation of the Dead Sea is -485 feet. What is the difference in the elevation between mt. Everest and the Dead Sea?
Answer: 29,513 feet
Explanation:
i) Elevation of Mt Everest = 29,028 feet
ii) Elevation of the Dead Sea = - 485 feet
iii) Difference in the elevation = Elevation of Mt Everest - elevation of the Dead Sea
iv) Difference in the elevation = 29,028 feet - ( - 485 feet) = 29,028 feet + 485 feet = 29,513 feet.
Remember the law of the signs: ( - ) × ( - ) = +
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