Answer: b 1.20
Step-by-step explanation:
b 1.20
Complete question :
In Hawaii a volcano is about to explodel At 6:00 am a device placed inside the volcano
measures the temperature at 69.5 degrees Celsius. Every 3 minutes the temperature
rises 1/5 a degree. If the Volcano explodes at 145.5 degrees Celsius how many hours do
they have to evacuate a nearby city?
Will Mark BRAINLIEST to the correct answer
Answer:
19 hours
Step-by-step explanation:
Given that:
Temperature of volcano at 6:00 am = 69.5°C
Average rise in temperature per 3 minute = 1/5
Hence, rise in temperature per minute = 0.0666666°C
Temperature at which volcano will explode = 145.5°C
Hence, change in temperature :
(145.5°C - 69.5°C) = 76°C
Hence, temperature will have to rise by 76°C
Rise in temperature / rate of temperature increase
= 76°C / 0.0666666°C
= 1140.0011 minutes
= 1140.0011 / 60
= 19.0000019 hours
= 19 hours
Answer:
25π or 78.5mm²
Step-by-step explanation:
Step-by-step explanation:
g. (1/4 + 1/2) = 3/4
3/4 ÷ 3/2 = 1/2
h. (1/5 - 1/2) = 3/10
3/10 ÷ 3/5 = 1/2
I. (2/5 ÷ 5/6) = 12/25
12/25 × 7/8 = 21/50
