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harkovskaia [24]

3 years ago

7

Raul eats 1/4 of candy bar

1 answer:

dexar [7]3 years ago

3 0

What is the question

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Calculate the length of BE

lora16 [44]

Answer:

BE = 72 cm

Step-by-step explanation:

$\frac{AB}{BC} = \frac{BE}{CD}$ (BPT Theorem)

$\frac{20}{5} = \frac{BE}{18} \\$

⇒ 4 = $\frac{BE}{18}$

⇒BE = 18 × 4

∴ BE = 72 cm

Hope this helps...

Please mark as Brainliest!!

6 0

3 years ago

The area of a circular oil slick on the surface of the sea is increasing at a rate of [150m^2/s] how fast is the radius changing

Akimi4 [234]

Answer with Step-by-step explanation:

We are given that

$\frac{dA}{dt}=150m^2/s$

a.Radius =25 m

We have to find rate of change of radius.

We know that

Area of circle, $A=\pi r^2$

Differentiate w.r.t time

$\frac{dA}{dt}=2\pi r\frac{dr}{dt}$

Substitute the values then we get

$150=2\pi (25)\frac{dr}{dt}$

$\frac{dr}{dt}=\frac{150}{50\pi}=\frac{3}{\pi} m/s$

$\frac{dr}{dt}=\frac{3}{\pi} m/s$

b.A= $1000m^2$

Substitute the values then we get

$1000=\pi r^2$

$\pi=3.14$

$r^2=\frac{1000}{3.14}$

$r=\sqrt{\frac{1000}{3.14}}=17.8m$

$\frac{dA}{dr}=2\pi r\frac{dr}{dt}$

Substitute the values then we get

$150=2\pi(17.8)\frac{dr}{dt}$

$\frac{dr}{dt}=\frac{150}{2\pi(17.8)}=\frac{150}{35.6\pi}$ m/s

$\frac{dr}{dt}=\frac{75}{17.8\pi}$ m/s

4 0

3 years ago

Geometry help: Solve for x

fomenos

Try writing and solving an equation of proportions:

4 5
---- = ----
6 x

Then 4x = 30, and x = 7.5 (answer)

7 0

4 years ago

How do you change this into simplest form?

bulgar [2K]

You devide by 4 and it is 21 over 25

4 0

3 years ago

PLEASE!!!!!!!!!!!! HELPPPP!!!!!!!!!!!!!!!!!!

Natalka [10]

<h3>x less than or equal to 5</h3>

8 0

4 years ago

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