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3 years ago

The graph shows a bacteria population as a function of the number of days since an antibiotic was introduced.

Mathematics

2 answers:

spayn [35]3 years ago

6 0

Answer:

14 million bacteria

Step-by-step explanation:

At time=0, the bacteria was introduced.

The first point on the graph, the y-point corresponding to t=0, is the initial amount of bacteria. This point is 14.

Since y-axis is given in millions, 14 corresponds to 14 million.

Hence, 14 million bacteria were present when the antibiotic was first introduced.

miss Akunina [59]3 years ago

4 0

14 million bacteria were present when the antibiotic was first introduced.

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4 years ago

2k•squared• + 7 - 15 factoring ax•squared•+bx+c

Rainbow [258]

Calculate Δ = b^2 -4ac => Δ = 169 => k1 = 3/2; k2 = -5 => 2k^2 + 7k - 15 = 2*(k -3/2)(k+5) = (2k - 3)(k+5);

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4 years ago

The number of volunteers to walk dogs at the local animal shelter last year was 20 this year the number of volunteers has risen

Alex73 [517]

There is 150% increase in the number of volunteers.

Step-by-step explanation:

Given,

Old number of volunteers = 20

New number of volunteers = 50

Change = New value - Old value

Change = 50 - 20 = +30

The positive sign indicates the increase.

Percent increase = $\frac{Change}{Old\ value}*100\\$

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4 years ago

Find the TWO integers whos product is -12 and whose sum is 1

konstantin123 [22]

Answer:

$\rm Numbers = 4 \ and \ -3.$

Step-by-step explanation:

Given :-

The sum of two numbers is 1 .
The product of the nos . is 12 .

And we need to find out the numbers. So let us take ,

First number be x
Second number be 1-x .

According to first condition :-

$\rm\implies 1st \ number * 2nd \ number= -12\\\\\rm\implies x(1-x)=-12\\\\\rm\implies x - x^2=-12\\\\\rm\implies x^2-x-12=0\\\\\rm\implies x^2-4x+3x-12=0\\\\\rm\implies x(x-4)+3(x-4)=0\\\\\rm\implies (x-4)(x+3)=0\\\\\rm\implies\boxed{\red{\rm x = 4 , -3 }}$

Hence the numbers are 4 and -3 

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3 years ago

Phil takes out a bank loan of $150 000 to buy a house, at an annual interest rate of 3.5%. The interest is calculated at the end

Deffense [45]

Answer:

You would owe the bank $105,000 in interest after 20 years.

Step-by-step explanation:

You first have to find what the one-year interest dollar amount, which is $5,250.

Then you simply multiply the one year dollar amount, by 20. (years).

20 x $5,250 = $105,000

giving you your final answer of $105,000

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1 year ago