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Irina18 [472]
3 years ago
8

What percent of 21 is 28?

Mathematics
2 answers:
Juli2301 [7.4K]3 years ago
7 0

Answer:

75%

Step-by-step explanation:

Sorry it took so long for me to see this

100%/x%=28/21

(100/x)*x=(28/21)*x       - we multiply both sides of the equation by x

100=1.333*x       - we divide both sides of the equation by (1.333) to get x

100/1.333=x

75=x

x=75

21 is 75% of 28

Good luck have a Nice Day

laiz [17]3 years ago
6 0

Answer:75

Step-by-step explanation:

21 divded by 28 times 100= 75

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A) Enter the corresponding values on the quadratic formula:
ollegr [7]

The answer is a = 0, b = -5, and c= 39.

<u>Step-by-step explanation</u>:

<u>step 1</u> :

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<u>step 2</u> :

The standard form is ax² + bx + c = 0.

<u>step 3</u> :

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x = (-b ± √(b2 − 4ac))/(2a)

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<u>step 4</u> :

The given equation is -5x +32.

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7 0
3 years ago
number of bacteria in a certain population Increases according to a continuous exponential growth model with How many hours does
vladimir1956 [14]

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Step-by-step explanation:

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The equation for population growth, after t hours, with a growth rate parameter of r, as a decimal, is given by:

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Growth rato parameter of 48% per hour

This means that r = 0.48. So

P(t) = P(0)(1+r)^t

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How many hours does it take the size of the sample to double?

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\log{(1.48)^t} = \log{2}

t\log{1.48} = \log{2}

t = \frac{\log{2}}{\log{1.48}}

t = 1.77

It takes 1.77 hours for the population to double.

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