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8_murik_8 [283]
3 years ago
8

Erin is buying floor tile to put in a room that is 10 ft by 15 ft. She has chosen tiles that are 18 in by 18 in. Assuming that s

he needs to buy 10% extra to be safe, how many tiles will she need to buy?
Mathematics
1 answer:
Ksenya-84 [330]3 years ago
3 0
She would need to get 73 pieces
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Group Work 2.6 Newton's Law of Cooling states that an object cools at a rate proportional to the difference between the temperat
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Answer:

ΔT = ΔT0 e^-K T

As I understand Newton's Law of Cooling

ΔT at any time is the difference between the temperature and the surroundings

Originally       ΔT0 = 95 - 22   difference between 95 and room temperature

65 - 22 = 33 = 73 e^-KT      where t is time to cool to 65 deg

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18 = 73 e^-.159 T

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Elena randomly chooses a number from 1 to 10. What is the probability she chooses a number greater than 5?
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ANSWER

P(E)=\frac{1}{2}

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S={1,2,3,4,5,6,7,8,9,10}

n(S)=10

The numbers greater than 5 are:

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The probability that, she chooses a number greater than 5 is:

P(E) =  \frac{n(E)}{n(S)}

Substitute the values,

P(E) =  \frac{5}{10}

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