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2 years ago

PLEASE HELP I HAVE 5 MINUTES PLEASE :(

Mathematics

2 answers:

seropon [69]2 years ago

6 0

Answer:

28.3

Step-by-step explanation:

Given, 

Radius of the circle = 4.5 m

Therefore, 

Circumference of the circle

$= 2\pi r$

$= 2 \times 3.14 \times 4.5$

= 28.26

Rounded to nearest tenth, 

= 28.3 (Ans)

a_sh-v [17]2 years ago

5 0

Answer:Looks hard for 8th grader

Step-by-step explanation:

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I got in my answer that x < 3

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The air force plane travelled for a total of 6.9 hours.

SOLUTION: 

Given, An Air Force plane left Nairobi and flew west at an average speed of 159 mph. A cargo plane left sometime later flying in the same direction at an average speed of 207 mph. After flying for 5.3 hours the cargo plane caught up with the Air Force plane.

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Now, we know that, $\text { distance travelled }=\text { speed } \times \text { time }$

For air force plane $\rightarrow \text { distance travelled }=159 \mathrm{x} \text { time taken by air force plane }$

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6 0

3 years ago

A triangular pyramid is formed from three right triangles as shown below.

Lady bird [3.3K]

ΔADC is a right angle triangle, we will use the Pythagorus Theorem to find the length CD.

Formula of the Pythagorus Theorem :

⇒ a² + b² = c²

⇒ AD² + CD² = AC²

The value of AD is 54 and the value of AC is 90:

54² + CD² = 90²

Solve for CD:

54² + CD² = 90²

CD² = 90² - 54²

CD² = 5184

CD = √5184

CD = 72

ΔADC is also a right angle triangle, we will use the Pythagorus Theorem to find the length BD.

Formula of the Pythagorus Theorem :

⇒ a² + b² = c²

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The value of CD is 72 and the value of BC is 97:

BD² + 72² = 97²

Solve for BD:

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Answer: The length of BD is 65 units.

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3 years ago

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Step-by-step explanation:

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