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mars1129 [50]
3 years ago
6

What fraction of 60 is… Chapter Reference 24

Mathematics
1 answer:
sergij07 [2.7K]3 years ago
7 0
Answer:<span> 3/5</span>

Explanation: <span>60/100</span> = <span>6/10</span> = <span>3<span>/5</span></span>
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A certain cylindrical tank holds 20,000 gallons of water which can be drained from the bottom of the tank in 20 minutes the volu
zalisa [80]
Given that the volume of water remaining in the tank after t minutes is given by the function

V(t)=20,000\left(1- \frac{t}{20} \right)^2

where V is in gallons, 0 ≤ t ≤ 20 is in minutes, and t = 0 represents the instant the tank starts draining.

The rate at which water is draining four and a half minutes after it begins is given by

\left.&#10; \frac{dV}{dt} \right|_{t=4 \frac{1}{2} = \frac{9}{2} &#10;}=\left[40,000\left(1- \frac{t}{20} \right)\left(- \frac{1}{20} &#10;\right)\right]_{t= \frac{9}{2} } \\  \\ =\left[-2,000\left(1- &#10;\frac{t}{20} \right)\right]_{t= \frac{9}{2} }=-2,000\left(1- &#10;\frac{4.5}{20} \right) \\  \\ =-2,000(1-0.225)=-2,000(0.775)=-1,550\, &#10;gallons\ per\ minute

Therefore, the water is draining at a rate of 1,550 gallons per minute four ans a half minutes after it begins.

Answer option E is the correct answer.
4 0
3 years ago
1. Coloreen la mitad de los triángulos de azul.
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4 0
3 years ago
Please help me with i ii iii<br> Step by step
UkoKoshka [18]

(i) I used distributive property to get the x’s and y’s out of parentheses. I then combined like-terms to simplify until I could do no more. That is your final answer for (i) is -3x - 12y

(ii) This one is similar to the first one, just with no parentheses. I combined like terms again until not like terms were left. Your final answer for (ii) is -3k -2 -2n

(iii) I started by dividing 15 by 3 and got 5, and because the 15 had an x to it, you get 5x. I then moved onto the next term, 9. 9 divided by 3, to get 3. Your final answer for (iii) is 5x + 3

7 0
3 years ago
Read 2 more answers
What is the interquartile range of this data set?<br> 2,5,9,11,18, 30, 42, 48, 55, 73, 81
Lubov Fominskaja [6]

Answer:

46

Step-by-step explanation:

55-9=46

2=min

9=Lq

30=median

55= Uq

81= max

3 0
3 years ago
If the zeros are 1 and -4, what are the factors?
Natali5045456 [20]

Answer:

(x - 1) and (x + 4)

Step-by-step explanation:

Given the zeros of a polynomial, say x = a, x = b then the factors are

(x - a), (x - b) and the polynomial is the product of the factors, that is

f(x) = (x - a)(x - b)

Here the zeros are x = 1 and x = - 4, thus the factors are

(x - 1) and (x - (- 4)), that is (x - 1) and (x + 4)

5 0
3 years ago
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