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3 years ago

Which function is an example of exponential growth? y = 2(0.3)x y = 1.5(0.4)x y = 3(8)x y = 2(0.7)x

1 answer:

7 0

Exponential equation is
y=a(b)ˣ

when b>1, it is growth
when 0>b>1, it is decay

so

we want the 2nd number to be more than 1
that would be the 3rd one, y=3(8)ˣ

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(1 point) An innovative rural public health program is reducing infant mortality in a certain West African country. Pretend the

nataly862011 [7]

Answer:

Infant mortality will reduce to 33% in 1.63 years

Step-by-step explanation:

Let the population be X

Population after 1 year

$X - 7.3$ % of $X$

$X -0.073 X\\0.927X$

As we know

$P = P_0 * e^{rt}$

Substituting the given values we get -

$\frac{P_0 - 0.33P_0}{P_0} = e^{-0.33 * t}\\0.67 = e^{-0.33 * t}\\$

Taking log on both sides we get -

$-0.20273 = -0.33 * t\\t = 1.627$

4 0

3 years ago

Is (-5,2), (5,2), (0,-3), (3,-8), (-7,4), (-1,-1) a function

Alja [10]

<h3>Answer: Yes it is a function</h3>

Each point listed is of the form (x,y). The x coordinate is always listed first. We dont have any repeat x values, so this is enough to conclude we have a function.

If you wanted to, you could graph each point given on the same coordinate grid. Note how none of the points stack on top of each other. Or put another way, note how it is impossible to draw a single straight line through more than one point graphed. This graph passes the vertical line test.

A function is where plugging in any x value leads to exactly one y value.

If you had two points like (5,2) and (5,7) then the input x = 5 leads to more than one output y = 2 and y = 7 at the same time, making this example not a function.

4 0

3 years ago

Shawna was going to sell all of her stamp

german

Answer:

She started with 50 stamps

Step-by-step explanation:

Hi! For these types of problems we always result to going backwards. So, she now has 30 right? So, to reverse into the problem, we do the opposite of what it says. "She then bought five more" 30 - 5 = 25. Then it says she sold half of them. 25 x 2 = 50. If we recheck by going back, she sold half of them (50 / 2 = 25) and she bought five more (25 + 5 = 30).

Hope this helps!

3 0

3 years ago

I have no idea how this works, but that's not the point here. I really need help on this algebra problem;

Ulleksa [173]

Basically you want to make the equation so that you have
x>something or x<something so basically solve for x or isolate x so

a+bx>cx-d
try to get all the x's on one side
subtract bx from both sides
a>cx-bx-d
add d to both sides
a+d>cx-bx
undistribute
a+d>(x)(c-b)
divide both sides by (c-b)

tada

so the solution is

$\frac{a+d}{c-b}$ >x or
x< $\frac{a+d}{c-b}$

4 0

3 years ago

Read 2 more answers

Which number is irrational? 13 6√ 0.14¯¯¯¯ 4√

skad [1K]

Answer:

The answer is square root of 6

Step-by-step explanation:

if you need anything els hmu!

7 0

3 years ago