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3 years ago

How do i find the area of a trapazoid

Mathematics

1 answer:

Simora [160]3 years ago

5 0

Answer:

base plus base divided by two then times height

Step-by-step explanation:

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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

3 years ago

I am a multiple of 70 I am between 300 and 500 I am 20 more than a multiple of 100 who am I?

Harlamova29_29 [7]

#420

because 70x4=420 within 300 and 500 and is greater than 400 which is a multiple of 100

8 0

3 years ago

Enter a recursive rule for the geometric sequence. 10, −80, 640, −5120, ...<br><br> a(1)=<br> a(n)=

Liula [17]

The recursive formula would be:
$a_1=10
\\a_{n}=a_{n-1} \times (-8)$

This is because the first term, a₁, is 10. A recursive rule is dependent upon the term before it (a(n-1)) and the common ratio. The common ratio, or the number that each term is multiplied by, is -8.

6 0

3 years ago

Read 2 more answers

Will give brainliest answer

yaroslaw [1]

Answer

Step-by-step explanation:

To find the area of a shape multiply its height by its width. For a square you only need to find the length of one of the sides (as each side is the same length) and then multiply this by itself to find the area.

please mark me as brainliest.

7 0

3 years ago

Read 2 more answers

a red string of holiday lights blinks once every 3 seconds while a string of blue lgihts blink once every 4 seconds. how many ti

gavmur [86]

The highest common factor of 4 and 3 is 12
one minute has 60 secs
thus it will blink 60/12=5 times

6 0

3 years ago

How do i find the area of a trapazoid ​

How do i find the area of a trapazoid