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2 years ago

A ladder leans against the wall of a building. There is a fence between the

Mathematics

2 answers:

a_sh-v [17]2 years ago

7 0

Answer:

Step-by-step explanation:

$\frac{2+1.5}{1.5} =\frac{x}{2.4} \\x=\frac{3.5}{1.5} *2.4=\frac{7}{3} *2.4=7*0.8=5.6$

Nuetrik [128]2 years ago

6 0

Answer:

5.9

Step-by-step explanation:

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3) If the speed limit on a highway in the UK is 70 miles per hour and

Afina-wow [57]

Step-by-step explanation:

for this we need to know the conversion rate between miles and kilometers :

1 mile = 1.60934 km

which means

1 km = 0.621371 miles

so,

70 m/h = 70×1.60934 km/h = 112.6538 km/h

compared to the 120 km/h limit in Canada, it is clear that the speed limit in Canada is higher.

the difference is

7.3462 km/h = 7.3462×0.621371 = 4.56471564 m/h

4 0

1 year ago

Lonnie plans to join the gym. He must pay a $35 membership fee. He will

SVETLANKA909090 [29]

Answer: 5

Step-by-step explanation:

6 0

2 years ago

A class survey in a large class for first-year college students asked, “About how many minutes do you study on a typical weeknig

Anika [276]

Answer: (110.22, 125.78)

Step-by-step explanation:

The confidence interval for the population mean is given by :-

$\mu\ \pm z_{\alpha/2}\times\dfrac{\sigma}{\sqrt{n}}$

Given : Sample size = 463

$\mu=118\text{ minutes}$

$\sigma=65\text{ minutes}$

Significance level : $\alpha=1-0.99=0.01$

Critical value : $z_{\alpha/2}=z_{0.005}=\pm2.576$

We assume that the population is normally distributed.

Now, the 90% confidence interval for the population mean will be :-

$118\ \pm\ 2.576\times\dfrac{65}{\sqrt{463}} \\\\\approx118\pm7.78=(118-7.78\ ,\ 118+7.78)=(110.22,\ 125.78)$

Hence, 99% confidence interval for the mean study time of all first-year students = (110.22, 125.78)

3 0

3 years ago

Rachael is placing a protective cover on a glass case. The case is a cube, and the perimeter of one cube face is 56 inches.

Dmitry_Shevchenko [17]

Answer:

336

Step-by-step explanation:

We know that a cube has 6 faces which means we can use this equation:

56 x 6 = 336

336 square inches is the answer.

5 0

2 years ago

Read 2 more answers

A scale model of a butterfly has a width of 12 centimeters and a height of 8 centimeters. If the actual width of the butterfly i

Nataliya [291]

Isn't it 5? x=5 cause the model's height is 4 less than the width so like if the actual width is 9 than the height is 4 smaller

8 0

3 years ago