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Q8. A cooling machine requires that room temperature to be lowered from 30°c at the rate of 5°c
every hour. What will be the

By Natalia

Q8. A cooling machine requires that room temperature to be lowered from 30°c at the rate of 5°c
every hour. What will be the room temperature after 8 hours of starting the process?
9. What will be the sign of the product if we multiply together 11 negative integers and 6 positive​

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Express x = 0.253 as a fraction in the simplest form.
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2 thoughts on “Q8. A cooling machine requires that room temperature to be lowered from 30°c at the rate of 5°c<br />every hour. What will be the”

  2. Answer:

    given,

    the temperature should be lowered to -30c to -5c

    we have to find,

    temperature after 8 hours

    so,

    temperature after 8 hr=8×-5

    =-40

    =( -40) -(-10=

    =-10

    explainatin,

    the temperature is lowered so it is written in negative {-30,-5} then we have to find the temperature after 8 hr so we multiplied 8×-5 then subract it by -30 because it is lowere

    q…9

    let 11 negative integers be -1,-2,-3,-4,-5,-6,-7,-8,-9,-10,-11

    and 6 positive integers be 1,2,3,4,5,6 so ,

    the no. of negative integer is greater so it should be negative

    Q9.

    the answer will be negative.

    because when you multiply an odd number of negative integers, the sign is always negative, and when you multiply an even number of negatuve integers the anwer always has aposotive sign

    Reply

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