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Ket [755]
3 years ago
13

at noon a tank contains 10 cm of water after several hours it contains 7 cm of water what is the percent decrease of water in th

e tank
Mathematics
1 answer:
ad-work [718]3 years ago
3 0

Answer:

30%.

Step-by-step explanation:

We have been given that at noon a tank contains 10 cm of water after several hours it contains 7 cm of water.

To find the decrease percent we will use formula:

\text{Decrease percent}=\frac{\text{Original value-new value}}{\text{Original value}}\times 100

Upon substituting our given values in above formula we will get,

\text{Decrease percentage of water in the tank}=\frac{10-7}{10}\times 100

\text{Decrease percentage of water in the tank}=\frac{3}{10}\times 100

\text{Decrease percentage of water in the tank}=3\times 10=30

Therefore, the percentage decrease of water in the tank is 30%.

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Salsk061 [2.6K]

yes 7*6=42 is a factor


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Can you plz help i don't understand
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Can someone please help mee
Andrew [12]

\quad \huge \quad \quad \boxed{ \tt \:Answer }

\qquad \tt \rightarrow \:Domain = [-9, -1]

\qquad \tt \rightarrow \:Range = [-1 , 3]

____________________________________

\large \tt Solution  \: :

Domain = All possible values of x for which f(x) is defined

[ generally the extension of function in x - direction ]

Range = All possible values of f(x)

[ generally the extension of function in y - direction ]

\large\textsf{For the given graph : }

\qquad \tt \rightarrow \: domain = [ - 9, -1]

\qquad \tt \rightarrow \: range= [ -1,3]

Answered by : ❝ AǫᴜᴀWɪᴢ ❞

3 0
2 years ago
3x2 + 5x - 7(x2 + 4)
goldenfox [79]

Answer:

-4x^2+5x-28

Step-by-step explanation:

Expand -7(x^2 +4) = 3x^2+5x-7x^2-28

Simplify 3x^2+5x-7x^2-28 = -4x^2+5x-28

5 0
2 years ago
Read 2 more answers
Luke has two summer jobs. During the week he works in the grocery store, and on the
TiliK225 [7]

Hello! First, let's get some important information:

Luke works in the:

  • week → grocery store → $16/hour
  • weekend → nursery → $22/hour

Now, let's analyze the questions:

<h3>a) How much does he earn if he works 5 hours at the grocery store and 8 hours at the nursery? </h3>

To find the amount he will receive, you must multiply the amount of 1 hour by the number of hours worked. Look:

\mathrm{Grocery\:Store}\\\\\$16 \cdot 5 \:\mathrm{hours}= \$80\\\$22 \cdot 8\:\mathrm{hours}=\$176

<h3>b) How much does he earn if he works g hours at the grocery store and n hours at the nursery?</h3>

\$16 \cdot \mathrm{g} \:\mathrm{hours}= \$16\cdot\mathrm{g}\\\$22 \cdot \mathrm{n}\:\mathrm{hours}=\$22\cdot\mathrm{n}

<h3>c) Total pay, 5 hours at the grocery store and 8 hours at the nursery:</h3>

You'll just have to just add the value in each of the jobs:

$80 + $176 = $256

<h3>d) Total pay, g hours at the grocery store and n hours at the nursery:</h3>

Adding the values of each job:

$16g + $22n

Hope this helps!

8 0
2 years ago
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