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3 years ago

Can someone please answer this question please answer it correctly and please show work please help me I need it

Mathematics

1 answer:

Sedbober [7]3 years ago

7 0

Answer:

Step-by-step explanation:

- 2 - 5 would represent a negative start, and further decreasing. So, a situation to describe this could be:

The temperature was -2°C and has decreased by 5°C.

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Air is being pumped into a spherical balloon at a rate of 5 cm^3/min. Determine the rate at which the radius of the balloon is i

Romashka-Z-Leto [24]

0.08 cm/min

Step-by-step explanation:

Given:

$\dfrac{dV}{dt}=5\:\text{cm}^3\text{/min}$

Find $\frac{dr}{dt}$ when diameter D = 20 cm.

We know that the volume of a sphere is given by

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

Taking the time derivative of V, we get

$\dfrac{dV}{dt} = 4\pi r^2\dfrac{dr}{dt} = 4\pi\left(\dfrac{D}{2}\right)^2\dfrac{dr}{dt} = \pi D^2\dfrac{dr}{dt}$

Solving for $\frac{dr}{dt}$ , we get

$\dfrac{dr}{dt} = \left(\dfrac{1}{\pi D^2}\right)\dfrac{dV}{dt} = \dfrac{1}{\pi(20\:\text{cm}^2)}(5\:\text{cm}^3\text{/min})$

$\:\:\:\:\:\:\:= 0.08\:\text{cm/min}$

3 0

2 years ago

5 ft

Effectus [21]

the answer is 3 ft because since the two triangles are diagonal to eachother (i forgot the word) they have the same side length ratio. the ratio of the bigger triangle is 10:6.

the other triangle has 1/2 of that ratio. 10/2=5 and 6/2=3

6 0

3 years ago

A polygon has an angle sum of 180 and each angle measures 60. What is the polygon?

Vladimir79 [104]

Idk what the answer is to your question

6 0

3 years ago

Solve for t. 16 - 2t = t + 9 + 4t please help.

Delvig [45]

Answer:t=1

Step-by-step explanation:

16-2t=t+9+4t

Collect like terms

4t+2t+t=16-9

Combine like terms

7t=7

Divide both sides by 7

7t ➗ 7=7 ➗ 7

t=1

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3 years ago

Plzzz helpppp urgenly❤️

lutik1710 [3]

Answer:

Students 1 and 2

Step-by-step explanation:

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3 years ago