Please answer this correctly

Mathematics

1 answer:

natka813 [3]2 years ago

8 0

Answer: Rectangular pyramid

Step-by-step explanation:

When you think about it, a pyramid has 3 faces that are triangular!

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Show the formula for finding the area of a triangle. Then find the area of a right triangle with a base of 19 cm and a height of

snow_tiger [21]

The answer is 61.75 because you have to do base times height then divide that answer by two

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3 years ago

The ages of commercial aircraft are normally distributed with a mean of 13.5 years and a standard deviation of 7.3 years. what p

Artist 52 [7]

Answer: The percent higher is 41.68%. If 49 planes were selected, 20 of them should be above 15 years.

To find the percent, we first need the z-score.

(15 - 13.5) / 7.3 = 0.21

Now, use a normal distribution table to find the percent above a score of 0.21. It will be 41.68%.

To find the number of 49 planes above this value, multiply 49 by 0.4168. You will have about 20.4 planes.

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2 years ago

Need answer ASAP ASAP please ASAP ASAP thank you:)

Paha777 [63]

Answer:

42°

Step-by-step explanation:

3x + 54° = 180° [Supplementary angles]

=> 3x = 180 - 54

=> 3x = 126

$= > x = \frac{126}{3}$

=> x = 42° (Ans)

5 0

2 years ago

Read 2 more answers

You fly a hot air balloon 3.5 miles above the ground. What is the measure of BD⌢, the portion of Earth that you can see? Round y

STatiana [176]

Answer:

$\Delta s \approx 334.545\,m$

Step-by-step explanation:

Let assume that Earth is a sphere, the following trigonometric diagram is constructed and presented below. The central angle is given by this inverse trigonometric equation:

$\theta = 2\cdot \cos^{-1} \left(\frac{r}{r+h} \right)$