At noon the temperature was -3 Celsius. Over the next 4 hours the temperature dropped another 15 degrees. Then every hour until 7 the temperature Rose 2 degrees. What was the temperature at 7
What is -3 -15 + 2(7) ?
Watch the order of operation.
To find the temperature at 7 PM, we can follow these steps:
Step 1: Start with the initial temperature at noon, which is -3 Celsius.
Temperature at noon = -3 Celsius
Step 2: The temperature dropped another 15 degrees over the next 4 hours.
Temperature after 4 hours = -3 Celsius - 15 degrees
= -3 Celsius - 15 degrees
= -18 Celsius
Step 3: Then, for every hour until 7 PM, the temperature rose 2 degrees.
Number of hours from 4 PM to 7 PM = (7 - 4) hours = 3 hours
Temperature increase = 3 hours * 2 degrees/hour
= 6 degrees
Step 4: Add the temperature increase to the temperature after 4 hours.
Temperature at 7 PM = Temperature after 4 hours + Temperature increase
= -18 Celsius + 6 degrees
= -12 Celsius
Therefore, the temperature at 7 PM is -12 Celsius.
To find the temperature at 7 PM, we need to follow these steps:
1. Start with the initial temperature at noon, which is -3 degrees Celsius.
2. Subtract the temperature drop over the next 4 hours. Since the temperature dropped by 15 degrees, we subtract 15 from -3: -3 - 15 = -18 degrees Celsius.
3. Calculate the number of hours from noon to 7 PM, which is 7 hours.
4. Determine how many times the temperature rose by 2 degrees during the 7 hours. Divide the number of hours (7) by the number of hours it takes for the temperature to rise by 2 degrees (1 hour): 7 / 1 = 7 times.
5. Add the temperature increase due to the rising of the temperature over those hours. The temperature increased by 2 degrees each hour for 7 times, so we add 2 degrees for each of the 7 hours: -18 + (2 * 7) = -18 + 14 = -4 degrees Celsius.
Therefore, at 7 PM, the temperature would be -4 degrees Celsius.