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Mkey [24]
3 years ago
15

find the area and circumference of the circule .(round your number to the nearest hunderth.) r=4.5 cm​

Mathematics
1 answer:
balu736 [363]3 years ago
4 0

Answer:

28.2743338823

Step-by-step explanation:

The circumference of every circle is 3.14, and in order to find the area you must do Pi (3.14) times the radius doubled (\pix R2) Hope that helped!

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A spherical balloon is inflating with helium at a rate of 64 pi StartFraction ft cubed Over min EndFraction . How fast is the​ b
olga2289 [7]

Answer:

The radius of the balloon is increasing at a rate of 4 feet per minute.

Step-by-step explanation:

We are given the following in the question:

\dfrac{dV}{dt} = 64\pi \dfrac{\text{ ft}^3}{\text{min}}

Volume of sphere is given by

V = \dfrac{4}{3}\pi r^3

where r is the radius of the balloon.

Instant radius, r = 2 ft

Rate of change of volume =

\dfrac{dV}{dt} = \dfrac{d}{dt}(\dfrac{4}{3}\pi r^3)\\\\\dfrac{dV}{dt} =4\pi r^2\dfrac{dr}{dt}

Putting values, we get,

64\pi = 4\pi (2)^2\dfrac{dr}{dt}\\\\\Rightarrow \dfrac{dr}{dt} = 4

Thus, the radius of the balloon is increasing at a rate of 4 feet per minute.

5 0
3 years ago
Hi, Please Help Me With This Math Question! 8th Grade!
TEA [102]
The answer for the question is 20.25
3 0
3 years ago
160% of what number is 19.2
riadik2000 [5.3K]

Answer:

The number is 12

Step-by-step explanation:

Let x be the number

160/100 = 1.6

1.6 x = 19.2

x = 19.2 / 1.6

x = 12

7 0
3 years ago
34.7985347985 rounded to the nearest tenth
Nina [5.8K]
The answer would be 34.8 I’m pretty sure
7 0
2 years ago
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Identify the equations as parallel lines, perpendicular lines, or neither.
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It is Perpendicular
5 0
2 years ago
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