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Romashka [77]
3 years ago
10

At 7:00 a.m., the temperature was 8°C. What was the temperature at midnight if the temperature was 10° lower? Incorrect answer

Mathematics
1 answer:
astra-53 [7]3 years ago
6 0

Answer:

b)−2° C

Step-by-step explanation:

hello! To solve this problem you should remember how are the operations with negative numbers, for this the only thing we must do is make a subtraction between the initial temperature (8° C) and the negative change of temperature (10° C)

Ti= initial temperature =8° C

ΔT= temperature change  =10° C

new temperature=Ti-ΔT

new temperature=8° C-10° C=-2° C

in conclusion the answer is -2° C

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3 years ago
The length and width of a living room is 5.5 m and 4.8 m with an uncertainty of 0.1 m in each measurement. The perimeter of the
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Answer:

The perimeter of room is (20.6 \pm 0.4)~m

Step-by-step explanation:

We are given the following in the question:

The length and width of a room are measured with uncertainties.

There is  uncertainty of 0.1 m in each measurement.

Length = (5.5 \pm 0.1)~m

Width = (4.8 \pm 0.1)~m

Formula:

The perimeter of room is given by:

P = 2\times (\text{Length + Width})\\P = 2\times ((5.5\pm 0.1)+ (4.8\pm 0.1))\\= 2\times (10.3\pm 0.2)\\P = (20.6 \pm 0.4)~m

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3 years ago
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Yanka [14]

Answer:

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Step-by-step explanation:

30 = 120% of y

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y = 30 × \frac{100}{120}

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