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Serjik [45]
3 years ago
11

A store is having 20% off sale. If the reduce price is 90.40, what is the original price

Mathematics
1 answer:
ipn [44]3 years ago
6 0
In order to find the original price, we need to divide by 4. This is because the price was reduced by 20%, it is 4/5 of the original price. 

By dividing by 4, we can see that 90.40 is 22.60. 

To find the original price, we add 22.60 (1/5 of the original price), to 90.40 (4/5 the original price) to find that $113 is the original price. 
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Initial number of Bacteria = Ao = 100
Number of Bacteria which make the person ill = A = 45,000,000

Growth rate = r = 150% = 1.50 

The equation model for this situation is:

A= A_{o}(1+r)^{t}

Using the values in above equation, we can write:

45000000=100(1+1.5)^{t}  \\  \\ 
450000=(2.5)^{t} \\  \\ 
log(450000)=log((2.5)^{t})  \\  \\ 
log(450000)=t*log(2.5) \\  \\ 
t= \frac{log(450000)}{log(2.5)} \\  \\ 
t=14.21

This means, the person will fall sick after about 14 hours.
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Simply multiply 243 with 3.

Step-by-step explanation:

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What is the awsner to (-6)(8) + (-11)
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Savings account with 200$ and receive 4% interest for 7 years, how much would be in the account?
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256

Step-by-step explanation:

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5 0
3 years ago
Three years after paying $2800 in a startup company, you sell for $2200. The total percent return is what?​
masha68 [24]

Answer:

The total percentage return is 26.19

Step-by-step explanation:

Given as :

The amount paid for three years = $ 2800

So, Total amount paid for three years = $ 2800 × 3 = $ 8400

The return amount after three years = $ 2200

The time period = 3 years

Let the percentage return = x %

So, According to question

x % of $ 8400 = $ 2200

Or, x % = \frac{2200}{8400}

Or, \frac{x}{100} = \frac{11}{42}

∴  x = \frac{11}{42} × 100

I.e x = 26.19

Hence The total percentage return is 26.19 Answer

3 0
3 years ago
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