2 years ago

Shelley's cup of tea cooled down 1/2 of a degree in 10 minutes. At what rate is her tea cooling down?

Mathematics

1 answer:

lana [24]2 years ago

5 0

1degree every 20 minutes or

3degrees per hour

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alekssr [168]

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Step-by-step explanation:

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2 years ago

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Tanya [424]

Answer:

$2.50$

Step-by-step explanation:

Given

$(x_1,y_1) = (-1,0.8)$

$(x_2,y_2) = (0,2)$

$(x_3,y_3) = (1,5)$

$(x_4,y_4) = (2,12.5)$

Required

The rate of change (b)

The above graph is represented as:

$y = ab^x$

For: $(x_2,y_2) = (0,2)$ ;

We have:

$y = ab^x$

$2 = a * b^0$

$2 = a *1$

$2 = a$

$a = 2$

For $(x_3,y_3) = (1,5)$ ,

We have:

$y = ab^x$

$5 = a * b^1$

$5 = a * b$

Substitute $a = 2$

$5 = 2 * b$

Divide by 2

$2.5 = b$

$b = 2.5$

<em>Hence, the rate of change is 2.50</em>

7 0

2 years ago

Analyze the diagram below and complete the instructions that follow.

Mnenie [13.5K]

Answer:

D. 157°

Step-by-step explanation:

∠EFB and ∠AFB form a linear pair, so are supplementary.

∠EFB = 180° - ∠AFB = 180° -23°

∠EFB = 157°

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3 years ago

HELP YOUR GUY!!!!!!!!!!!!!!!

padilas [110]

Answer:

310.86ft²

Step-by-step explanation:

30/2 = 15

3.14*15² = 706.5

30+3+3 = 36

36/2 = 18

3.14*18² = 1017.36

1017.36 - 706.5 = 310.86

Hope it helps

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2 years ago

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A farmer sells 6.3 kg of apples and pears at the farmers .2/5 of this weight is apples and the rest is pears. How many kg of pea

Studentka2010 [4]

Answer:

4.8/5

Step-by-step explanation:

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3 years ago