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3 years ago

5

The average resident of a country uses 100 gallons of water per day. The population of the country is about 3.23 * 10^8 . About

how many gallons of water do the country's residents use each day? Express your answer in scientific notation.

1 answer:

Maru [420]3 years ago

4 0

Answer:

3.23×1010

Step-by-step explanation:

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Arisa [49]

Its 15 divided by 2.49 which is 6.02, then you have to divide 20 divide by 3.32 which equals 6.02. They are both equal Both a and B are equal

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The price of gold has increased by 35% per year from 2000. In the year 2000, Harry bought a gold ring for $590. Which of the fol

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The function representing the price of the ring x years after 2000 is f(x) = (100 + 35)/100 *x + 590 = 135/100 *x + 590 = 1.35x + 590
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What is the height of a trapezoid with an area of 99 in.2 whose bases are 6 in. and 12 in.?

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Answer:

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Step-by-step explanation:

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3 years ago

Joe drove 345 miles on 25 gallons of gas What was his average miles per gallon?

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How many liters of 60% alcohol solution should be added to 40 liters of a 20% alcohol solution to make a 50% solution?

kolbaska11 [484]

Answer:

120 liters of 60% alcohol solution is needed

Step-by-step explanation:

Let's assume

x liters of 60% alcohol solution is added

so, we get solution as

$=\frac{60}{100}\times x$

$=0.6x$

we are given

40 liters of a 20% alcohol solution is

$=40\times\frac{20}{100}$

$=40\times\frac{20}{100}$

$=8$

so, total alcohol solution is

$=8+0.6x$

now, we can find total solutions

total solutions is

$=x+40$

now, it is making 50% solution

so, we get

$\frac{8+0.6x}{x+40} =\frac{50}{100}$

now, we can solve for x

$\left(8+0.6x\right)\cdot \:100=\left(x+40\right)\cdot \:50$

$800+60x=50x+2000$

$10x=1200$

$x=120$

So,

120 liters of 60% alcohol solution is needed

4 0

3 years ago