Which of the following are examples of exponential decay? - The population of a Florida is increasing by 43% each year.
- The pesticide DDT has a half-life of 15 years.
- March Madness has 64 teams in the bracket. Each round, half the teams are eliminated.
- After an antibiotic is added to a culture of bacteria, the number of bacteria is reduced by half every three hours.
- A tree frog population doubles every three weeks.

Answers

Answer 1

Answer: The correct answer for the question that is being presented above is this one: "- The pesticide DDT has a half-life of 15 years; - March Madness has 64 teams in the bracket. Each round, half the teams are eliminated; - After an antibiotic is added to a culture of bacteria, the number of bacteria is reduced by half every three hours."

Answer 2

Answer:

Answer: the correct ones are

B “ The pesticide DDT has a half live of 15 years”

C “March madness has 64 teams in the bracket. Each round, half the teams are eliminated” and

D “After an antibiotic is added to a culture of bacteria, the number of bacteria is reduced by half every three hours”

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WHAT IS THE DOMAIN OF (F+G) (X) ?

Solve each system by substitution. (3x+2y=23, 1/2x-4=y), (4x=3y-2, 18=3x+y), (4y+3=3y+x, 2x+4y=18), (4y-x=5+2y, 3x+7y=24)

Answers

(31/4, 1/8)

(4,6)
these are the answers to the first two

How do i solve question 25

Answers

I never learned to do operations with absolute values, so I don't have
the standard tools to use. The only thing I have to work with when I run
into one of these is my brain. So there are probably better ways to do it,
but here's how I would approach this one:

The fraction itself is either positive or negative. Either way, its absolute
value is less than 4.

If the fraction is positive, then you can just throw away the absolute-value
bars, and work it like a normal inequality ... multiply each side by (x-3), then
work it down so there's nothing but 'x' on the left side, etc.

If the fraction is negative AND its absolute value is less than 4, then the
fraction itself is greater than -4 . Throw away the absolute-value bars,
change the inequality to say that, and then work it like a normal inequality.

Do BOTH of these, and you'll come out with two inequalities for 'x' ... it's
more than something AND less than something else. Put these together
into one inequality, and you have the whole range for what 'x' can be.

Sounds complicated. One of these days, I should learn the right way
to do these.

$(x+2)/(x-3) \ \textgreater \ 4$ or $(x+2)/(x-3) \ \textless \ -4$

$x+2 \ \textgreater \ 4(x-3)$

$x+2 \ \textgreater \ 4x-12$

$x+14 \ \textgreater \ 4x$

$14 \ \textgreater \ 3x$

$4 (2)/(3) \ \textgreater \ x$ <-answer

$(x+2)/(x-3)\ \textless \ - 4$

$x+2\ \textless \ - 4(x-3)$

$x+2\ \textless \ - 4x+12$

$x-10\ \textless \ - 4x$

$-10\ \textless \ - 5x$

$2\ \textless \ x$ <-answer

2 < x < 14/3

Round 354,605 to nearest thousand

Answers

Answer

355,000.

Explanation

When rounding numbers we count digits from the right to the left. The first place value from the right is once followed by tens, hundreds, thousands etc.

354,605

5 ⇒ ones

0 ⇒ tens

6 ⇒ hundreds

4 ⇒ thousands

354,605 to the nearest thousands is 355,000.

Answer:

$355,000$

Step-by-step explanation:

We have been given an number $354,605$ . We are asked to round our given number to the nearest thousand.

Upon looking at our given number we can see that the value of the 1st dropped figure that is at hundreds place value, is greater than 5.

Since hundreds place value is 6 or we can see that last three digits are 605, therefore, we will round up our number to nearest thousand as:

$354,605\approx 355,000$

Is 1000 feet greater than 300 yrs

Answers

No 1000 feet isn't greater than 300 years

actually, yes. 300 yards are 900 feet

1000ft > 900ft.

-4x-2y=-12 4x+8y=-24

Answers

Answer:

$x=6\n \ny=-6$

Step-by-step explanation:

Given the system of two equations:

$\left\{\begin{array}{l}-4x-2y=-12\n \n4x+8y=-24\end{array}\right.$

Add these two equations (left side add to left side and right side add to right side):

$-4x-2y+4x+8y=-12+(-24)\n \n-2y+8y=-12-24\n \n6y=-36\n \ny=-6$

Substitute $y=-6$ into the first equation:

$-4x-2\cdot (-6)=-12\n \n-4x+12=-12\n \n-4x=-12-12\n \n-4x=-24\n \nx=6$

THIS IS URGENT I AM BEING TIMED IF YOU ANSWER ALL OF THEM I WILL MARK YOU BRAINLYIST.Fresh salmon is selling for $5.65 a pound. Use a decimal to find how much 3/5 of a pound would cost?

Answers

Answer:

$3.39

Step-by-step explanation:

5.65÷5= 1.13

1.13•3=3.39

Answer: $3.39

Step-by-step explanation: take $5.65 divide by 5 gives you 1/5 times by3 for 3/5

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