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bearhunter [10]
2 years ago
14

a pool which is a right rectangular prism is partially filled with water the length and width of the pool is 30m and 8m the volu

me of the water in the pool is 70m what is the height of the water
Mathematics
1 answer:
bazaltina [42]2 years ago
4 0

Answer:

The height of the pool = 0.292 m

Step-by-step explanation:

For a right rectangular prism;

V = w*h*l

where; length (l) = 30 m

width (w) = 8 m

The volume v = 70 m

Thus; from V = w*h*l

The height of the pool = \dfrac{V}{wl}

The height of the pool = \dfrac{70}{30*8}

The height of the pool = 0.292 m

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A movie collector has 105 movie posters and 90 band posters if she sells 21 movie posters then how many band posters should she
kotykmax [81]

Hi there! :)

<u>Answer:</u>

In order to maintain the same ratio, she should sell 18 band posters.


<u>Step-by-step explanation:</u>

<u>Initial ratio:</u>

Ratio is: 105 movie posters for 90 band posters = <u>105 : 90</u>


She sells 21 movie posters, which means that we are left with 105 movies minus the 21 she sold.

105 - 21 = 84 → She now has <u>84</u> movie posters.


In order to answer your question, you'll need to use the cross product method:

105 movie posters → 90 band posters

84 movie posters  → X

<u>(90 × 84)</u> ÷ 105 = X

<u>7,560 ÷ 105</u> = X

72 = X ⇒ Number of band posters she should have left to maintain the same ratio.

She has 90 band posters :

90 <u>- X</u> = 72

Add "X" to each side of the equation → 72 + X = 72 + X

90 = <u>72</u> + X

Subtract 72 from each side of the equation → 90 - 72 = 18

<u>18 = X</u>


There you go! I really hope this helped, if there's anything just let me know! :)

4 0
3 years ago
Area of a 12 ft circle
Mnenie [13.5K]
113.10 feet, 16,286 square inches, 12.566 square yards, 10.507 square meters, 105,071 square centimeters
4 0
2 years ago
I made some brownies and cookies to sell for a local fundraiser. The cookies sold for $0.75 each and the brownies sold for $1.25
juin [17]

Answer:

Brownies made the most money

Step-by-step explanation:

Let c = cookies

b = brownies

We sold 51 items  so c+b = 51

Cookies are .75  and brownies are 1.25

.75c + 1.25 b = 53.25

We have 2 equations and 2 unknowns

c = 51-b

Substituting into the second equation

.75(51-b) + 1.25b = 53.25

Distribute

38.25-.75b +1.25b = 53.25

Combine like terms

38.25+.5b = 53.25

Subtract 38.25 from each side

38.25 +.5b -38.25 = 53.25 -38.25

.5b =15

Divide each side by .5

.5b/.5 = 15/.5

b = 30

Now find c

c =51-b

c = 51-30

c = 21

They sold 30 brownies and 21 cookies

30 brownies * 1.25 =37.50

21 cookies *.75 = 15.75

Brownies made the most money

3 0
3 years ago
What is 9/10 + 7/100?
svet-max [94.6K]

9/10 + 7/100

find the common denominator for 9/10 which is 100

multiply by 10 for 9/10

(9)(10)=90

(10)(10)=100

90/100+7/100

Answer:

97/100

8 0
3 years ago
Read 2 more answers
PLS HELP I WILL GIVE BRAINLY THINGY
VashaNatasha [74]

Answer: The y is going to be 7

Explanation: Because 5y/35 divide 5 both sides cancel the both 5's and y stays by itself and 35/5 equals 7. 7*5= 35

8 0
3 years ago
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