bactena population doubles n sze every 5 hours. After 5 hours, the sample contains 2,000 bacteria Which equation best models y. the population size after x hours?

Answers

Answer 1

Answer:

Answer:

$Y=1000*2^(x)$

Step-by-step explanation:

It is given that A bacteria population doubles in size every 5 hours. After 5 hours, the sample contains 2,000 bacteria.

and also Y=populations size and x=number of hours.

so at x=0 , Y=1000 and after 5 hours x=5 ,Y=2000. and after 5 more hours

at x=10, Y=4000

so we see that it is doubling every 5 hours i.e. the Equation will be like this

$Y=1000*2^(x)$

where x= multiple of 5 years.

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Mallorie has $3 in her wallet.If this is 10% of her monthly allowance, What is her monthly allowance?

Answers

her monthly allowance is $30! hope this helped

So its 10% of __ is 3
so we have to divide 3 by .1 because 10% as a decimal is .1(move two decimal places).

10% of 30 is 3
to check the answer: .1 times 30 is 3

Sal is making bracelets for a fundraiser. He uses 6 inches of yarn per bracelets. How many bracelets can sal make with 5 feet feet of yarn?

Answers

Answer:

10 bracelets

Step-by-step explanation:

1ft=12in

5ft=12(5) in

5ft= 60 in

60in÷6in per bracelet

=10 bracelets

hope this helped! :D

Which polynomial represents a sum of cubes?x^3+9

4x^3+1

8x^3+1

64x^3-27

Which of the following polynomials represents a difference of squares?

4x^2-8

9x^2+16

16x^2-2

49x^2-25

Answers

Answer:

1) The polynomial $8x^3+1$ represents a sum of cubes

2) The polynomial $49x^2-25$ represents a difference of squares

Step-by-step explanation:

1) To find the polynomials represents a sum of cubes :

$8x^3+1$ represents a sum of cubes

For $8x^3+1$

$=2^3x^3+1^3$

$=(2x)^3+1^3$

Therefore $8x^3+1=(2x)^3+1^3$

Therefore $8x^3+1$ represents a sum of cubes

2)To find the polynomials represents a difference of squares :

$49x^2-25$ represents a difference of squares

For $49x^2-25$

$=7^2x^2-5^2$

$=(7x)^2-5^2$

Therefore $49x^2-25=(7x)^2-5^2$

Therefore $49x^2-25$ represents a difference of squares

Explain why you should record a 1 in the tens column when you regroup in an addition problem.

Answers

The regrouping method help to make a sum equation became easier by separating the numbers into 'tens' and 'onesWhen the total amount of 'ones' has reach 10 or more , you should record a 1 in the tens column to show that the value of 'tens' has increased
Hope this helps. Let me know if you need additional help!

What is the decimal equivalent of 9 11 ?

Answers

You mean 9/11?

Dividing 9 by 11 will give you the correct answer. It's that simple.
9/11 = 0.8181 recurring

so your answer is 0.8181

4(1.5c+6)-2c=-9 I need a help my teacher doesn't help

Answers

4(1.5c+6)-2c=-9 so we distribute the 4 to 1.5 tand 6 and it will now be broken into this ==> 6c+24-2c=-9 ok now we most combine like terms so the we do 6c-2c= 4c so the problem is now 24-4c=-9 ok now i think we need to solve for c so we subtract 24 to -9 because it is negative it is now -33 so the problem is -4c=-33 divide by -4 and you will get your answer. I hope this helped and is correct.

Ok4(1.5c + 6) - 2c = -9First u do distributive property, and if u put arrows pointing from the number outside the parenthesis to each of the numbers inside u remember easier according to my math teacher. So 4 times 1.5c is 6c then 4 times 6 is 24Now the problem is written:6c + 24 - 2c = -9Now u add/subtract like terms so 6c - 2c is 4cSo 4c + 24 = -9Subtract 24 from both sides:4c = -33And now u just have to dived both sides by 4 to isolate the cAnd remember a negative times a positive is a negative (my math teacher taught us: bad things that happen to good people is a bad thing, to remember it)So the answer is:C = -8.25Now that it is corrected, I hope that helps :)

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