3 years ago

Please help me with this!!!!

Mathematics

1 answer:

WITCHER [35]3 years ago

3 0

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A circle has a circumference of 26.69 meters. Find the diameter ( in meters). (Round your answer to one decimal place).

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Answer:

8.5 meters

Step-by-step explanation:

the circumference is the diameter times 3.14 or pi

to find the diameter divide the circumference by 3.14

26.69/3.14 = 8.5

Checking our work

8.5 * 3.14= 26.69

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4 years ago

jarptica [38.1K]

Answer:

3 gallons

Step-by-step explanation:

Let

x ----> the amount of pure acid (100% solution) in gallons

Remember that

$100\%=100/100=1$

$20\%=20/100=0.20$

$60\%=60/100=0.60$

we know that

$(1)(x)+(0.20)(3)=(0.60)(x+3)$

solve for x

$x+0.60=0.60x+1.80$

$x-0.60x=1.80-0.60\\0.40x=1.20\\x=3\ gal$

therefore

3 gallons of pure acid should be mixed with 3 gallons of a 20% acid solution in order to get a 60% acid solution

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