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Y_Kistochka [10]
3 years ago
10

Will some one please help me asap

Mathematics
1 answer:
olya-2409 [2.1K]3 years ago
7 0
Formula: Circumference = πD

Given that diameter = 42,
 
    ⇒ Circumference = π (42) = 132 ft


Answer: 132 ft
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The volume of a sphere is 28/3 times it surface area, find the surface area​
pentagon [3]

Answer:

615.44 units squared

Step-by-step explanation:

Let the volume and surface area of the sphere be V and S respectively.

\therefore V = \frac{28}{3} \times S\\\\\therefore \frac{4}{3} \pi {r}^{3}  =  \frac{28}{3} \pi {r}^{2}  \\  \\  \frac{ {r}^{3} }{ {r}^{2} }  =  \frac{28\pi}{3}  \times  \frac{3}{4\pi}  \\  \\ r = 7 \: units \\  \\ \because S = 4\pi {r}^{2}  \\  \\  \therefore \: S = 4 \times 3.14 \times  {7}^{2}  \\  \\ \therefore \: S = 12.56 \times 49 \\  \\  \therefore \: S =615.44 \:  {units}^{2}

7 0
3 years ago
What must you do if you multiply one number in a ratio by n?
Gala2k [10]
Hi there!

From what I know, when you multiply one number in a ratio, you must also multiply the other number by the same number. This allows for the ratio to stay the same, thus keeping it correct. If both terms were not multiplied by n, the ratio would no longer be the correct ratio.

Hope this helps!! :)
If there's anything else that I can help you with, please let me know!
4 0
4 years ago
HELP!!! Is this a function or not a function<br> Why or why not
defon

Answer:

Yes, it is a function

Step-by-step explanation:

anytime you want to test to see if the graph is a function, perform a vertical line test.

Basically if you drew a vertical line and the vertical line crosses the graph at only one point that means the graph is a function.

If it crosses on more than one point the graph is not a function.

6 0
2 years ago
In a certain study comma the chances of encountering a car crash on the road are stated as ​"1 in 20​." Express the indicated de
Murljashka [212]

Answer:

The probability is 0.05.

Step-by-step explanation:

A probability is the number of desired outcomes divided by the number of total outcomes.

In a certain study comma the chances of encountering a car crash on the road are stated as ​"1 in 20​."

This means that in 20 times you go out on the road, in 1 of them you are expected to encounter a car crash.

This means that

p = \frac{1}{20} = 0.05

The probability is 0.05.

7 0
4 years ago
2z - 4 - z = ? help solve
saul85 [17]
Let's simplify step-by-step.
2
z
−
4
−
z
=
2
z
+
−
4
+
−
z
Combine Like Terms:
=
2
z
+
−
4
+
−
z
=
(
2
z
+
−
z
)
+
(
−
4
)
=
z
+
−
4
3 0
3 years ago
Read 2 more answers
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