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3 years ago

Calculate the speed of a dog running through a yard covering 24m in 52s

Mathematics

1 answer:

MissTica3 years ago

7 0

2.16666... -Meters Per Second
About 4.8467- Miles Per Hour
About 7.8- Kilometer Per Hour

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savannah is painting a striped background for a mural on a wall that is 15 yards long. she wants a total of 96 stripes that’s ar

adell [148]

In this item, we are tasked to determine the calculation that can be done in order to determine the length or width of the painted mural in each striped area. This can be done by dividing the total length by the number of stripes as shown in the equation below.

Length per stripe = Total length / number of stripes
Length per stripe = 15 yards / 96 stripes
= 0.15625 yard/stripe

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3 years ago

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Given WRST is a parallelogram and

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It would be a parallelogram

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2 years ago

A random sample of 10 parking meters in a beach community showed the following incomes for a day. Assume the incomes are normall

Vlad1618 [11]

Answer: (2.54,6.86)

Step-by-step explanation:

Given : A random sample of 10 parking meters in a beach community showed the following incomes for a day.

We assume the incomes are normally distributed.

Mean income : $\mu=\dfrac{\sum^{10}_{i=1}x_i}{n}=\dfrac{47}{10}=4.7$

Standard deviation : $\sigma=\sqrt{\dfrac{\sum^{10}_{i=1}{(x_i-\mu)^2}}{n}}$

$=\sqrt{\dfrac{(1.1)^2+(0.2)^2+(1.9)^2+(1.6)^2+(2.1)^2+(0.5)^2+(2.05)^2+(0.45)^2+(3.3)^2+(1.7)^2}{10}}$

$=\dfrac{30.265}{10}=3.0265$

The confidence interval for the population mean (for sample size <30) is given by :-

$\mu\ \pm t_{n-1, \alpha/2}\times\dfrac{\sigma}{\sqrt{n}}$

Given significance level : $\alpha=1-0.95=0.05$

Critical value : $t_{n-1,\alpha/2}=t_{9,0.025}=2.262$

We assume that the population is normally distributed.

Now, the 95% confidence interval for the true mean will be :-

$4.7\ \pm\ 2.262\times\dfrac{3.0265}{\sqrt{10}} \\\\\approx4.7\pm2.16=(4.7-2.16\ ,\ 4.7+2.16)=(2.54,\ 6.86)$

Hence, 95% confidence interval for the true mean= (2.54,6.86)

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3 years ago

Many older homes have electrical systems that use fuses rather than circuit breakers. A manufacturer of 40-amp fuses wants to ma

zhenek [66]

Answer:

Alternative hypothesis 1: the mean amperage at which the fuses burn out is > 40 amperes.

Alternative hypothesis 2: the mean amperage at which the fuses burn out is < 40 amperes.

Step-by-step explanation:

Recall that the null hypothesis is the fact you want to refute and is in doubt.

So, in this specific case, the null hypothesis would be that the mean amperage at which the fuses burn out is 40 amperes.

The alternative hypothesis are those that want to refute the null hypothesis, in this case there are 2:

Alternative hypothesis 1: the mean amperage at which the fuses burn out is > 40 amperes.

Alternative hypothesis 2: the mean amperage at which the fuses burn out is < 40 amperes.

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3 years ago

1/4 + 3 = ?? What’s the answer??

murzikaleks [220]

Answer:

3.25

Step-by-step explanation:

divide then add 3

5 0

2 years ago

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