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3 years ago

How do I find the standard deviation of the 100 times?

SAT

1 answer:

vivado [14]3 years ago

5 0

Answer:

Explanation:

So it is asking 100 times so that means it is asking for which is the greatest interval so 90 would be the right answer.

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What cause and effect relationships have to do with women in forensic science?

PIT_PIT [208]

Dunne ch rndkdme d such 3jd down e djdksendbd diner day

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2 years ago

Newton’s law of cooling states that for a cooling substance with initial temperature t0, the temperature t(t) after t minutes ca

antoniya [11.8K]

The cooling rate of the substance is approximately 0.0732.

According to the statement, the Newton's law of cooling is defined by the following formula:

$T(t) = T_{s} + (T_{o}-T_{s})\cdot e^{-k\cdot t}$ (1)

Where:

$T_{s}$ - Final temperature, in degrees Celsius.
$T_{o}$ - Initial temperature, in degrees Celsius.
$t$ - Time, in minutes.
$k$ - Cooling rate, in $\frac{1}{min}$ .
$T(t)$ - Current temperature, in degrees Celsius.

Please notice that substance reaches thermal equilibrium when $T(t) = T_{s}$ , that is when temperature of the substance is equal to the temperature of surrounding air.

If we know that $T_{o} = 80\,^{\circ}C$ , $t = 15\,min$ , $T_{s} = 50\,^{\circ}C$ and $T(15) = 60\,^{\circ}C$ , then the cooling rate of the substance is:

$60 = 50 + (80 - 50)\cdot e^{-15\cdot k}$

$\frac{60-50}{80-50}= e^{-15\cdot k}$

$\frac{1}{3} = e^{-15\cdot k}$

$k = -\frac{1}{15}\cdot \ln \frac{1}{3}$

$k \approx 0.0732$

The cooling rate of the substance is approximately 0.0732.

To learn more on Newton's law of cooling, we kindly invite to check this verified question: brainly.com/question/13748261

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1 year ago

What observation about baking powder suggests that it is a mixture of substances?

Leya [2.2K]

Baking powder is primarily used as a leavening agent in baked goods and products. It is a combination of cornstarch, cream of tartar and baking soda. The main observation that suggests that it is a mixture of substances is that fact that it produces a gas which facilitates the rising of the baked goods.

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2 years ago

What technique is illustrated in this diagram microbiology

Eduardwww [97]

The technique that is known to be illustrated is said to be DNA hybridization.

<h3>What is DNA hybridization?</h3>

In the study of genome, DNA hybridization is known to be a kind of a molecular biology method that is often used to know the measures or the degree of genetic similarity that exist between a given pools of DNA sequences.

DNA hybridization is also seen as ability of two given strand of complementary DNA that tends to pair with another strand and it is one that can be used to find out other similar DNA sequences in two other kinds of species or within a given genome of a single species.

Note that in the case above, The technique that is known to be illustrated is said to be DNA hybridization.

Learn more about microbiology from

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1 year ago

Which of the following equation has x = 6 as the solution?.

Drupady [299]

3x = 3 x 6 should be the equation because 3 x x is 3 x 6

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1 year ago