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3 years ago

WHERE ARE THE EXPERTS AND ACE!!!!!!! I NEED HELP PLS SHARE YO SMARTNESS!!!!! WILL GIVE BRAINLIEST AND RATE AND VOTE!!!

Mathematics

1 answer:

Volgvan3 years ago

4 0

Answer:

D and B

Step-by-step explanation:

2) (59.6)/180 * pi=1.04

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What is the solution to the system of equations?

OLEGan [10]

Answer:

The solution to the system is (-2,6)

Step-by-step explanation:

I said the solution to the system is (-2,6) because that is where both lines cross, meaning that's the solution.

Hope this is hepful.

3 0

3 years ago

Find the sum of this infinite geometric series: 4 - 2.88 + 2.0736- 1.492992+...

kirza4 [7]

Let $r$ be the common ratio between terms. Then

$-2.88=4r\implies r=-0.72$

Now denote the $n$ th partial sum of the series by

$S_n=4-2.88+2.0736-1.492992+\cdots+4(-0.72)^{n-1}+4(-0.72)^n$

Multiply both sides by $-0.72$ , then subtract from the above to get

$S_n-(-0.72S_n)=4-4(-0.72)^{n+1}$
$1.72S_n=4(1-(-0.72)^{n+1})$
$S_n=2.32558(1-(-0.72)^{n+1})$

As $n\to\infty$ , you're left with

$S_\infty=2.32558$

3 0

3 years ago

-7=12x-16 how do i solve this

Elanso [62]

Answer:

Solution given:

-7=12x-16

add both side by 16

16-7=12x-16+16

subtract like terms

9=12x

dividing both side by 12

9/12=12x/12

x=9/12

reduce fraction

x= $\frac{3*3}{4*3}$

<u>x=¾</u>

3 0

3 years ago

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The mass of carbon is 1.995 x 10^-23 grams per atom and the mass of hydrogen is

Goshia [24]

Answer:

Carbon

Step-by-step explanation:

When the power of 10 is negative, the less the exponent the bigger the number

3 0

3 years ago

Read 2 more answers

The weight of an organ in adult males has a bell-shaped distribution with a mean of 330 grams and a standard deviation of 15 gr

wolverine [178]

Answer: a) (315,345) b) 99.7%, c) 0.14%, d) 97.36%

Step-by-step explanation:

Since we have given that

Mean = 330 grams

Standard deviation = 15 grams

(a) About 68% of organs will be between what weights? 

We will use 68-95-99.7 rule, it is empirical.

as we know that

$P(\mu-\sigma\leq X\leq \mu +\sigma)\approx 0.6827$

So,

$\mu -\sigma=330-15=315\\\\\mu+\sigma=330+15=345$

So,the 68% of the data falls within three standard deviation or will be between (315 grams and 345 grams)

(b) What percentage of organs weighs between 285 grams and 375 grams?

$\mu+3\sigma=330+3\times 15=330+45=375\\\\\mu-3\sigma=330-3\times 15=330-45=285$

so, 99.7 % of organs weighs between 285 grams and 315 grams, because the these two values are within one standard deviation of the mean.

(c) What percentage of organs weighs less than 285 grams or more than 375 grams? 

Since it is 3 standard deviation below the mean and 3 standard deviations above the mean.

so, it becomes

$1-0.9973=0.0027\\\\\dfrac{0.0027}{2}=0.00135\\\\So,0.00135\times 100=0.135\%=0.14\%$

Since 285 grams is 3 standard deviation below the mean(=330 grams) and 375 grams is 3 standard deviation above the mean(=330 grams).

So 0.14% data is lies below the 285 grams and 0.14% data is lies above the 375 grams.

(d) What percentage of organs weighs between 300 grams and 375 grams?

$\mu-2\sigma=330-2\times 15=330-30=300\\\\\mu+3\sigma=330+3\times 15=330+45=375$

So, 300 grams is 2 standard deviation below the mean i.e. 330 grams and 375 grams is 3 standard deviation above the mean i.e. 330 grams.

so, percentage of organs weighs would be

$100-2.5-0.14=97.36\%$

Hence, a) (315,345) b) 99.7%, c) 0.14%, d) 97.36%.

4 0

3 years ago

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