At 6:00 A.M., the temperature was 67 F. As a cold front passed, the temperature began to drop at a steady rate of 4 F per hour. Estimate, to

Question

At 6:00 A.M., the temperature was 67 F. As a cold front passed, the temperature began to drop at a steady rate of 4 F per hour. Estimate, to the nearest 15 minutes, how long it would take to reach freezing (32 F) if the drop in temperature continued at the same rate.

in progress 0
Euphemia 3 years 2021-09-04T02:12:27+00:00 2 Answers 9 views 0

Answers ( )

  1. Nick
    0
    2021-09-04T02:14:06+00:00
    Reply

    Step-by-step explanation:

    Temperature = 67F

    Decrease per hour = 4F

    Decrease per 15 minutes(60/15 = 4) = 4F/4 = 1F

    Number of hours of decrease = x

    67 – 4x = 32

    67 – 32 = 4x

    35 = 4x

    x = 35/4 = 8 3/4 hours = 8hours 45minutes

  2. thachthao
    0
    2021-09-04T02:14:14+00:00
    Reply

    Answer:

    initial temperature =67F

    rate of decrease = 4F per hour

    67-4k= 15

    or 4k=52

    k=52/4=13

    it takes 13 hours

    Step-by-step explanation:

Leave an answer

Browse

Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )