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ahrayia [7]
2 years ago
14

56% of what number is 84

Mathematics
1 answer:
damaskus [11]2 years ago
7 0
We set up a proportion: 84/?= 56/100

Cross multiply: 56*?= 84*100
⇒ ?= 84*100/56= 150

56% of 150 is 84.
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Total world consumption of iron was approximately 900 million tons in 1993. If consumption had increased by 2.5% each year and t
Lilit [14]

Step-by-step explanation:

We can model the annual consumption of iron by the equation

c = 900 million tons x 1.025^n, where

n is the number of years after 1993 and

c is the consumption for that year.

An estimate for the total consumption of iron can now be obtained by integrating this equation with respect to a dummy variable, x from 0 to n.

C = 900*10^6* \int\limits^n_0 {1.025^x} \, dx

This equation simplifies to

C = 900 million tons x (1.025^n - 1) / ln(1.025), where

x is a dummy variable and

C is the total consumption of iron n years after 1993.

Let R be the amount of iron remaining at n years after 1993, so

R = 480 billion tons - C

R = 480 billion tons - 900 million tons x (1.025^n - 1) / ln(1.025)

We need to find the value of n when R is 0, so

0 = 480 billion tons - 900 million tons x (1.025^n - 1) / ln(1.025)

Simplify this equation to obtain

n = 107.4

So the iron will run out in the year 1993 + 107 = 2100

6 0
2 years ago
Guidelines for the amount of supplementary nitrogen needed to grow winter wheat depend on the amount of nitrogen in the soil​ (a
Ierofanga [76]

The net profit or income for case A and case B based on the information will be $9250 and $9500 respectively.

<h3>How to compute the net profit?</h3>

Case A:

Based on the information, the price of fertilizer will be:

= 0.25 × 100 × 50

= $1250

Price of wheat = 3.50 × 50 × 50

= $10500

Net profit = $10500 - $1250

= $9250

Case B:

Price of fertilizer will be:

= 0.50 × 70 × 50

= $1750

Price of wheat = 4.50 × 50 × 50

= $11250

Net profit = $11250 - $1750

= $9500

Therefore, the net profit or income for case A and case B based on the information will be $9250 and $9500 respectively.

Learn more about net income on:

brainly.com/question/15530787

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3 0
1 year ago
2. What is the mode for the data set 13, 11, 10, 12, 14, 9,
Mashutka [201]

Answer:

11

Step-by-step explanation:

mode is the number that is most frequent

11

5 0
2 years ago
Read 2 more answers
1=1/8+x+2/8<br> Pls help and hurry
TEA [102]

Answer:

x = 5/8 plz give branliest

Step-by-step explanation:

Using the equation,1 = \frac{1}{8}  + x + \frac{2}{8}

simplify 1 = x + \frac{3}{8}

1 - \frac{3}{8} = x

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6 0
3 years ago
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jack got the expression 7x+1 and then wrote his answer as 1+7x is his answer an equivalment expression how do you know
Ugo [173]
The equation was just flipped around, it will equal the same no matter what.

I hope this helps!! :)
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