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RideAnS [48]
2 years ago
8

This list shows concentrations of carbon dioxide (in parts per million) in the Earth's atmosphere for the years 1950, 1955, 1960

, 1965, 1970, 1975, 1980, and 1985. Find the mathematical model that best fits the data, and use it to predict the global mean temperature in 2015. Code 1950 as 1, 1955 as 2, and so on, in five-year segments.
311 314 317 320 326 331 339 346


A. linear model; 373

B. quadratic model; 412

C. exponential model; 374

D. power model; 346

Mathematics
1 answer:
Marat540 [252]2 years ago
7 0

Answer:

Choice B

The mathematical model that best fits the data is a polynomial of order 2 as shown on the attachment.

The predicted global mean temperature in 2015 is; 412.24

Step-by-step explanation:

The first step is to obtain a scatter plot of the data and then fit a trend line. A quadratic polynomial fits the data well considering the large value of the coefficient of determination of 0.9984.

To determine the global mean temperature in 2015 we substitute x with 14 in the quadratic model;

y = 0.4643(14)^2 + 0.7976 (14) + 310.07

  = 412.24

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Jada solved the equation Negative StartFraction 4 over 9 EndFraction = StartFraction x over 108 EndFraction for x using the step
GalinKa [24]

Answer:

Jada should have multiplied both sides of the equation by 108.

Step-by-step explanation:

The question is incomplete. Find the complete question in the comment section.

Given the equation -4/9 = x/108, in order to determine Jada's error, we need to solve in our own way as shown:

Step 1: Multiply both sides of the equation by -9/4 as shown:

-4/9 × -9/4 = x/108 × -9/4

-36/-36 = -9x/432

1 = -9x/432

1 = -x/48

Cross multiplying

48 = -x

x = -48

It can also be solved like this:

Given -4/9 = x/108

Multiply both sides by 108 to have:

-4/9 * 108 = x/108 * 108

-4/9 * 108 = 108x/108

-432/9 = x

x = -48

Jada should have simply follow the second calculation by multiplying both sides of the equation by 108 as shown.

7 0
3 years ago
Ok this is stressin me out anyone know this
Levart [38]
X=7.
9x-7y=63
9x-7 x 0=63
9x - 0=63
9x=63
X=7.

Y=-9
9 x 0 -7y=63
8 0
2 years ago
you buy two pairs of shoes in a sale. you pay the full price of $48 for the first pair , and you get the second pair for half th
saveliy_v [14]

Answer:

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Step-by-step explanation:


6 0
2 years ago
18. Given PQ | BR. Then find the measure of x​
maria [59]

<em>Answer:</em>

<em>∠x = 70°</em>

<em>Step-by-step explanation:</em>

<em>Given that PQ||BR</em>

<em>Line PQ and BR with transversal AC,</em>

<em>∠x + ∠ACR = 180°     {Co-interior angles}</em>

<em>⇒∠x + 110° = 180°       {From what I can see it looks like 110.}</em>

<em>⇒∠x = 180° - 110°</em>

<em>⇒</em><em>∠x = 70°</em>

7 0
2 years ago
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shtirl [24]

Answer:

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3 0
2 years ago
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