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3 years ago

Please answer brainlest

Mathematics

1 answer:

Sergio039 [100]3 years ago

8 0

Answer:

1st page: Less than (<)

2nd option: 1st and 2nd option

Step-by-step explanation:

1st page: Not up to 12 visitors

n < 12

2nd page:

-2 > -10

-8 > -10

3rd page:

b < 11 (The board is shorter than 11 centimeters)

b > 11 (The box contains more than 11 books)

b < 12 (There are fewer than 12 beetles in a jar)

b > 12 (The building is taller than 12 feet)

4th page

Choose the arrow pointing left and no shaded dot and place it on 20.2

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Simplify the expression -5 + r/2i

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ri2−5 i put it in my caculator

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4 years ago

A thermometer is taken from an inside room to the outside, where the air temperature is 20° f. after 1 minute the thermometer re

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The change in the temperature is proportional to the difference in temperatures. Let's call the initial temperature of the room and the thermometer $E_0$ and the current temperature $E(t)$ where $t$ is the elapsed time in minutes. The outside temperature is 20 F.

Newton's Law of Cooling:

$E(t) - 20 = (E_0 - 20) e^{- k t}$

We're given $E(1)=70 \textrm{ and } E(5)=45$

$70-20 = (E_0 - 20) e^{-k}$

$45-20 =(E_0 - 20) e^{-5k}$

Dividing,

$\dfrac{50}{25}=e^{4k}$

$k = \dfrac 1 4 \ln 2$

Now,

$E(t) - 20 = (E_0 - 20) e^{- k t}$

$E_0 = 20 + (E(t) - 20)e^{k t}$

$E_0 = 20 + (E(1) - 20)e^{k}$

$E_0 = 20 + (70 - 20)e^{\ln 2/4}$

$E_0 = 20 + 50 \cdot 2^{1/4} \approx 79.46 \textrm{ degrees F}$

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4 years ago

There are 45 M&Ms in a standard size bag. At 360 calories per bag,

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Step-by-step explanation:

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3 years ago

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Use all four operations and at least one exponent to write an expression that has a value of 100.

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