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2 years ago

PLEASE HELP! 40 POINTS

Mathematics

1 answer:

Anuta_ua [19.1K]2 years ago

8 0

Answer:

-1 -1

Step-by-step explanation:

because thats were they touch

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A sphere is just enclosed inside a right circular cylinder. If the volume of the sphere is 140 cm3, find the volume of the gap b

alexgriva [62]

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Find Radius :
-----------------------------------------------------------
$\text {Volume of a sphere =} \dfrac{4}{3} \pi r^3$

$\dfrac{4}{3} \pi r^3 = 140$

$\pi r^3 = 140 \times \dfrac{3}{4}$

$\pi r^3 = 105$

$r^3 = \dfrac{105}{ \pi}$

$r = 3.22 \ cm$

-----------------------------------------------------------
Find volume of the cylinder :
-----------------------------------------------------------
$\text {Volume of the cylinder = } \pi r^2h$

$\text {Volume of the cylinder = } \pi ((3.22)^2(3.22 \times 2)$

$\text {Volume of the cylinder = } 209.77 \ cm^3$

-----------------------------------------------------------
Find volume of the gap :
-----------------------------------------------------------
$\text {Volume of gap = } 209.77 - 140$

$\text {Volume of gap = } 69.77 \ cm^3$

-----------------------------------------------------------
$\bf \text {Answer : } 69.77 \cm^3$
-----------------------------------------------------------

6 0

3 years ago

Rectangle A has 7 times the area of rectangle

krok68 [10]

Wa=0.5Wb, Ha=20, Hb is unkown
the area of rectangle a is : Wa*20
the area of rectangle b is : Wb*Hb
Rectangle a has 7 times the area of rectangle b: Wa*20=7*Wb*Hb
Replace Wa with 0.5Wb: 0.5Wb*20=7Wb*Hb => Hb=10/7

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3 years ago

Elaine has three types of nuts, peanuts, cashews and almonds, that she combines and stores in a large container: There are three

wlad13 [49]

Answer:

There are 9 ounces of peanuts

Make the ounces of cashews equal to three, and this works! Don’t know the math otherwise :|

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2 years ago

I will give BRAINLIEST for questions 3 and 4

lisov135 [29]

3. A 4. C
your welcome :)

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3 years ago

Answer these true or false questions:

stepan [7]

Sometimes it helps to put a number line in front of you. If one number is to the left of the other number on the number line, it's a lower number. If one number is to the right of the other number on the number line, it is greater.

-5 -4 -3 -2 -1 0 1 2 3 4 5

4 is a solution of x<-5
FALSE: 4 is not greater than -5

-3 is a solution of y>-2
FALSE: -3 is not greater than -2

y≤3 includes 3 as a possible solution
TRUE: 3 is less than OR EQUAL to 3

Hope this helps! :)

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2 years ago