Question

A mercury thermometer records a temperature of 8 degrees Fahrenheit at 10 A.M. If the temperature drops by 3 degrees Fahrenheit every hour , what will be the temperature by 2 P.M. of the same day

Answer 1

Answer:

4 degrees

Step-by-step explanation:

10 am - 8

11 am - 5

12 noon- 2

1 pm - -1

2 pm - -4

Answer 2

Solution :-

since the temperature drops by 3 degrees Fahrenheit every hour . Let us assume that, the given temperature is in AP .

So,

→ Temperature at 10AM = first term = a = 8° F

→ Common difference = d = (-3)° F

→ nth term = at 2 PM = 10 AM to 2PM = 5

then,

→ T(n) = a + (n - 1)d

→ T(4) = 8 + (5 - 1)(-3)

→ T(4) = 8 + 4 * (-3)

→ T(4) = 8 - 12

→ T(4) = (-4)° F (Ans.)

Hence, the temperature by 2 P.M. of the same day will be (-4)° F .

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