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kotegsom [21]
2 years ago
11

A sweater was on sale at 40% off the regular price. Ella saved $20 by buying the sweater

Mathematics
1 answer:
nataly862011 [7]2 years ago
3 0

Answer:

50 dollars

Step-by-step explanation:

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The half-life of a radioactive substance is the time it takes for a quantity of the substance to decay to half of the initial am
Gnesinka [82]

Answer:

  N = 74(1/2)^(t/2.8)

Step-by-step explanation:

The exponential function expressing a half-life relation can be written ...

  amount = (initial amount) × (1/2)^(t/(half-life))

For the numbers given in this problem, this is ...

  N = 74(1/2)^(t/2.8)

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Some folks like to express these relations in the form ...

  N  = 74e^(-kt)

In this form, the value of k is ...

  k = ln(2)/(half-life) ≈ 0.693147/2.8 ≈ 0.24755

  N = 74e^(-0.24755t)

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Which is the graph of x^2/9 + y^2/4 = 1
ladessa [460]

Answer:

Step-by-step explanation:

it is an ellipse.

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Marina86 [1]

Answer:

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Step-by-step explanation:

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Read 2 more answers
Cooper weighs 20 pounds. when he is an adult dog, he will weigh about 350% as much as his current weight. how much will cooper w
dexar [7]

The cooper's weight as an adult dog will be 90 pounds.

<h3>What is percentage?</h3>

Percentage, which is a relative figure used to denote hundredths of any quantity. One percent (symbolized as 1%) is equal to 100 parts; hence, 100 percent denotes the complete amount, and 200 percent designates double the amount specified.

A typical method for calculating a percentage is the formula shown below:

  • Determine the total amount of what you want to find a percentage.
  • Divide the number to determine the percentage.
  • Multiply the value by 100.

Calculation for the weight of Cooper as an adult;

Cooper's present weight is 20 pounds.

He will weigh about 350% as much as his current weight.

Calculate 350% of 20 pounds.

= (350×20)/100

= 70

The increment of the weight of Cooper will be 70 pounds.

Thus, the total weight is 20 + 70 = 90.

Therefore, the weight of Cooper after 350% as an adult would be 90 pounds.

To know more about the percent change, here

brainly.com/question/809966

#SPJ4

3 0
2 years ago
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