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2 years ago

25 POINTS!!!!!

Mathematics

2 answers:

IrinaVladis [17]2 years ago

6 0

250m should be the answer

olchik [2.2K]2 years ago

5 0

Answer:

250 m

Step-by-step explanation:

Assuming that:

1 m= 3.3ft

We can make the conversion from feet per second to meters per second with this procedure:

( 165 ft/s)(1m/3.3ft)=50 m/s

Let be "x" the number of meters the parachutist will fall during 5 seconds of free fall

Knowing that in 1 second the parachutist falls 50 meters, we can calculate "x" by solving the following multiplication:

x= (50 m/s)(5s)

x=250m

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The third graph

Step-by-step explanation:

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3 years ago

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1<br> Determine the number of solutions for the equation.<br> - 3(42x +46) = -15(-22-9x)

kkurt [141]

Answer:

x=-52/29

Step-by-step explanation:

-3(42x+46)=-15(-22-9x)

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2 years ago

How do you work out 510 divided by 15

Gala2k [10]

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Step-by-step explanation:

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2 years ago

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2 years ago

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The water diet requires you to drink two cups of water every half hour from the time you get up until you go to bed, but otherwi

Elan Coil [88]

Answer:

$7-3.182 \frac{13.638}{\sqrt{4}}= -14.698$

$7+3.182 \frac{13.638}{\sqrt{4}}= 28.698$

Step-by-step explanation:

For this case we have the following info given:

Weight before diet 180 125 240 150

Weight after diet 170 130 215 152

We define the random variable $D = before-after$ and we can calculate the inidividual values:

D: 10, -5, 25, -2

And we can calculate the mean with this formula:

$\bar X= \frac{\sum_{i=1}^n X_i}{n}$

And the deviation with:

$s= \sqrt{\frac{\sum_{i=1}^n (X_i- \bar X)^2}{n-1}}$

And after replace we got:

$\bar D= 7, s_d = 13.638$

And the confidence interval for this case would be given by:

$\bar D \pm t_{\alpha/2} \frac{s_d}{\sqrt{n}}$

The degrees of freedom are given by:

$df = n-1= 4-1=3$

For the 95% of confidence the value for the significance is $\alpha=0.05$ and the critical value would be $t_{\alpha/2}= 3.182$ . And replacing we got:

$7-3.182 \frac{13.638}{\sqrt{4}}= -14.698$

$7+3.182 \frac{13.638}{\sqrt{4}}= 28.698$

6 0

2 years ago