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4 years ago

12 over 68 is equal to 43 over d? what is d?

Mathematics

2 answers:

tia_tia [17]4 years ago

7 0

D is twenty seven because you have to add sixty eight and twelve then subtract forty three

pentagon [3]4 years ago

5 0

12/68= 43/d

Divide 43 by 12 which is 3.583

then multiply 68 by 3.583

So d is 243.6

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A growth medium is inoculated with 1,000 bacteria, witch grow at rate of 15% each day. What is the population of the culture 6 d

Sonja [21]

Answer: the population of the culture 6 days after inoculation is 2313.

Step-by-step explanation:

The growth rate is exponential. We would apply the formula for exponential growth which is expressed as

y = b(1 + r)^ t

Where

y represents the population after t days.

t represents the number of days.

b represents the initial population.

r represents rate of growth.

From the information given,

b = 1000

r = 15% = 15/100 = 0.15

t = 6 days

Therefore

y = 1000(1 + 0.15)^6

y = 1000(1.15)^6

y = 2313

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3 years ago

Why wealthy colonists used the Africans as workers? help asp

Vlad1618 [11]

Answer:

they provided cheap labour

Step-by-step explanation:

this is because Africans were sold as slaves to the rich colonialists.

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3 years ago

Solve using the elimination method! 2x + 8y = 4 x - 5y = 11

Lina20 [59]

Answer: The answer is {(0,0)} !

Step-by-step explanation:

4 0

3 years ago

How do i solve this question, anyone help

Degger [83]

Answer:

a. $\sqrt{52}$ cm or 7.21cm

b. $\sqrt{170}$ cm or 13.04cm

c. x= $\sqrt{136}$ cm or 11.66cm, y= $\sqrt{191}$ cm or 13.82cm

Step-by-step explanation:

a. You have to find the length of the other two sides of the triangle using the information already given. The first side is 6cm and the other is 12-9=4cm. Because it's a right-angled triangle you can use pythagoras

$c^2=a^2+b^2\\x^2=6^2+4^2\\x^2=36+16\\x^2=52\\x=\sqrt{52}cm \\x=7.21cm$

b. You can use pythagoras again because it's a right-angle triangle

$x^{2} =7^2+11^2\\x^2=170\\x=\sqrt{170} cm\\ = 13.04cm$

c. In this question you have to find x and y. We need to find x first using pythagoras

$x^2=6^2+10^2\\x^2=136\\x=\sqrt{136}cm \\=11.66cm$

Now that we've found x we can find y using pythagoras but instead of find c, we will find another side

$c^2=a^2+b^2\\19^2=\sqrt{170} ^2 + b^2\\361=170+b^2\\361-170=170+b^2-170\\191=b^2\\b=\sqrt{191}cm \\=13.82cm$

Hope this helps :)

8 0

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s2008m [1.1K]

4 1/6 thats what i got for the question

3 0

4 years ago