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icang [17]
3 years ago
13

8≤r-14z+4≥2zhelp me plz

Mathematics
1 answer:
Nikitich [7]3 years ago
6 0
The answer for the first one is
22 \leqslant r
You have to add both sides by 14 and you will get my answer.

I'm sorry I don't know the answer for the second one.

Hope this helps though!
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Question 12 1 pts If the population of a country is reported in the year 1990 as 471.56 million and in the year 2000 as 492.53 m
I am Lyosha [343]

Answer:

  526.39 million

Step-by-step explanation:

The exponential equation can be written as ...

  p(t) = 471.56(492.53/471.56)^(t/10)

Then p(25) ≈ 525.75 . . . . million

__

The closest answer choice is 526.39 million.

__

<em>Comment on the answer choice</em>

Reverse-engineering the answer, we find it was computed using the exponential equation ...

  p(t) = 471.56e^(0.0044t)

  p(25) = 471.56·1.116278 ≈ 526.39

The k factor in the exponent is <em>inappropriately rounded</em> from 0.004350903. You cannot use a 2-significant-figure constant to arrive at an accurate 5-significant-figure answer.

3 0
3 years ago
In 1992, the moose population in a park was measured to be 4260. By 1996, the population was measured again to be 3660. If the p
masha68 [24]

In 1992, the moose population in a park was measured to be 4260. By 1996, the population was measured again to be 3660. If the population continues to change linearly: A.) Find a formula for the moose population, P , in terms of t , the years since 1990. P ( t ) = B.) What does your model predict the moose population to be in 2008?

<u>Answer:</u>

Model predict the moose population to be in 2008 is 1860

<u>Solution:</u>

Let us consider this problem on graph, taking the x axis to be years since 1990 and y on the graph be the number of moose

We have two points on the graph:  (2, 4260) and (6, 3660)

Using the slope formula we can find the slope :

\mathrm{m}=\frac{y_{2}-y_{1}}{x_{2}-x_{1}}

m=\frac{(3660-4260)}{(6-2)}

m = -150                                  

Now that we have the slope of the line, we can use the point-slope formula to find the equation for the line as follows:-

\begin{array}{l}{y-y_{1}=m\left(x-x_{1}\right)} \\\\ {y-4260=-150(x-2)} \\\\ {y-4260=-150 x+300} \\\\ {y=-150 x+4560}\end{array}

Since the formula that is being sought is supposed to be interms of P and t, we will replace y with P and x with t

P(t) = -150t + 4560

Number of years from 1990 to 2008 is  

2008 - 1990 = 18

So, population in 2008 will be

P(18) = -150 (18) + 4560

P(18) = -2700 + 4560

P(18) = 1860

Thus the model to predict the moose population in 2008 is found

4 0
3 years ago
What is the surface area of the rectangular prism below?
nataly862011 [7]

Answer:

<h2>700 (units^{3\\)</h2>

Step-by-step explanation:

Surface Area =2 length x width + 2 length x height + 2 height x weight

so we do:

7 x 12     = 84                                     84 x 2  =                                         168

7 x 14     = 98                                     98 x 2 =                                       +  196

14 x 12   = 168                                    168 x 2=                                       <u> + 336</u>

                                                                                                                 700

700

5 0
2 years ago
Can someone help please?
Neko [114]

Answer:

900

Step-by-step explanation:

You subtract 1,230 by 330

5 0
3 years ago
Read 2 more answers
Please use Bodmas rule to solve the problem for mee<br> (3+5)4
amm1812

Answer:

The answer is 32 .........

4 0
2 years ago
Read 2 more answers
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