2 years ago

A skyscraper in London, England, has a roof in the shape of a square pyramid. Its approximate dimensions are shown in the net.

Mathematics

2 answers:

ella [17]2 years ago

8 0

Answer: 3300

Step-by-step explanation:

laiz [17]2 years ago

5 0

Answer:

3300

Step-by-step explanation:

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An angle measures 98° less than the measure of its supplementary angle. What is the measure of each angle?

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Answer: 41 and 139 degrees

Step-by-step explanation:

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1 year ago

A source of laser light sends rays AB and AC toward two opposite walls of a hall. The light rays strike the walls at points B an

____ [38]

Answer: 70 meters.

Step-by-step explanation:

Observe the figure attached.

The distance between the walls is:

$DE=AD+AE$

Both triangles are right triangles. Therefore, you can calculate the distance between the walls as following:

- Calculate the distance AD:

$cos\alpha=\frac{adjacent}{hypotenuse}\\\\cos(60\°)=\frac{AD}{60}\\AD=30m$

- Calculate the distance AE:

$tan\beta =\frac{opposite}{adjacent}\\\\tan(45\°)=\frac{40}{AE}\\\\AE=\frac{40}{tan(45\°)}\\\\AE=40m$

Therefore the distance between the walls is:

$DE=30m+40m=70m$

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2 years ago

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Solve each equation. 1/3a = -5 a = ? 12 - b = 12.5 b = ? -0.1 = -10c c = ?

Rina8888 [55]

Answer:

a = -15, b = -.5, c = -1

Step-by-step explanation:

1/3a = -5 --> multiply each side with 3 --> a = -15

12 - b = 12.5 --> subtract 12 from both sides --> -b = .5 --> multiply each side with -1 to get b positive --> b = -.5

.1 = -10c --> multiply each side with -10 --> c = -1

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2 years ago

At a local college 100 students were asked about their major fields of study. The results are shown below. What is the probabili

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7/10

Step-by-step explanation:

To find the probability that a student is a liberal arts or female, we have to add together all of the people who were female or liberal arts majors in the study. If we add those together, (15 + 18 + 17 + 20) we get 70. 70/100 can be simplified to 7/10.

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2 years ago

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