Respuesta :
[tex]-4[/tex]° was the temperature,in degrees at 7 pm .
Step-by-step explanation:
Here we have , at 3 pm ,the outside temperature was 4 degrees f .the temperature then fell steadily by 2 degrees every hour for the next four hours. We need to find what was the temperature,in degrees at 7 pm .Let's find out:
At 3 pm , Temperature was 4° . Then , temperature then fell steadily by 2 degrees every hour for the next four hours , Total decrease in temperature:
⇒ [tex]2(4)[/tex]
⇒ [tex]8[/tex]
So , In next 4 hours after 3 pm there is decrease in 8° temperature , But initially temperature was 4° , So , Temperature after 4 hours i.e. at 7 pm :
⇒ [tex]4-8[/tex]
⇒ [tex]-4[/tex]°
Therefore , [tex]-4[/tex]° was the temperature,in degrees at 7 pm .
The temperature at 7 pm is -4 degrees, if the temperature at 3 pm is 4 degrees then it fell steadily by 2 degrees every hours for the next four hours.
Step-by-step explanation
The given is,
At 3 pm the outside temperature was 4 degrees
Then it fell steadily by 2 degrees for every hour, for the next four hours.
Step:1
Let, T - Temperature
The temperature at 3 pm,
T = 4 degrees ( ∵ from given)
Step:2
Temperature at 4 pm,
T = (4 - 2) degrees (∵ steadily fell 2 degrees for each hour)
= 2 degrees
Temperature at 5 pm,
T = (2-2) degrees
= 0 degrees
Temperature at 6 pm,
T = (0-2) degrees
= -2 degrees
Temperature at 7 pm,
T = (-2 - 2) degrees (∵ both signs are same (negative), so we add the two numbers)
= -4 degrees
Result:
The temperature at 7 pm is -4 degrees, if temperature at 3 pm was 4 degrees, then it fell steadily by degrees every hours for next four hours.
