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3 years ago

HELP PLEASE 10 POINTS

Mathematics

1 answer:

Black_prince [1.1K]3 years ago

7 0

B is the answer you are looking for

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Determine what type of model best fits the given situation:

lyudmila [28]

Let value intially be = P

Then it is decreased by 20 %.

So 20% of P = $\frac{20}{100} \times P = 0.2P$

So after 1 year value is decreased by 0.2P

so value after 1 year will be = P - 0.2P (as its decreased so we will subtract 0.2P from original value P) = 0.8P-------------------------------------(1)

Similarly for 2nd year, this value 0.8P will again be decreased by 20 %

so 20% of 0.8P = $\frac{20}{100} \times 0.8P = (0.2)(0.8P)$

So after 2 years value is decreased by (0.2)(0.8P)

so value after 2 years will be = 0.8P - 0.2(0.8P)

taking 0.8P common out we get 0.8P(1-0.2)

= 0.8P(0.8)

$=P(0.8)^{2}$ -------------------------(2)

Similarly after 3 years, this value $P(0.8)^{2}$ will again be decreased by 20 %

so 20% of $P(0.8)^{2} \frac{20}{100} \times P(0.8)^{2} = (0.2)P(0.8)^{2}$

So after 3 years value is decreased by $(0.2)P(0.8)^{2}$

so value after 3 years will be = $P(0.8)^{2} - (0.2)P(0.8)^{2}$

taking $P(0.8)^{2}$ common out we get $P(0.8)^{2}(1-0.2)$

$P(0.8)^{2}(0.8)$

$P(0.8)^{3}$ -----------------------(3)

so from (1), (2), (3) we can see the following pattern

value after 1 year is P(0.8) or $P(0.8)^{1}$

value after 2 years is $P(0.8)^{2}$

value after 3 years is $P(0.8)^{3}$

so value after x years will be $P(0.8)^{x}$ ( whatever is the year, that is raised to power on 0.8)

So function is best described by exponential model

$y = P(0.8)^{x}$ where y is the value after x years

so thats the final answer

3 0

3 years ago

Estimate the product of 126.12 and 2.2.

kifflom [539]

Product means the answer/result to a multiplication problem

Estimate means to form an approximation/ rough guess

126.12 x 2.2 = 277.464

This answer, 277.464, is the exact product

Its wanting us to find the estimate (there could be possible estimates, depending on what the instructions is asking for):

- 277
- 280
- 300

6 0

4 years ago

The area of this rectangle is 30 m^2 . which is the perimeter of the rectangle ?

irga5000 [103]

Answer:

D. 26 m

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

What is the value of -8+4-7+9-2+(-5)

dsp73

Answer:

-9

Step-by-step explanation:

-8+4-7+9-2+(-5)

-8+4-7+9-2-5

-8-7-2-5+4+9

-22+13

-9

6 0

3 years ago

For the following description of data, identify the W's, name the variables, specify for each variable whether its use indicates

marin [14]

Answer:

As given in the problem statement,it should be treated as quantitative Students in the northeastern United States was measured and it is a correct option B is correct option.

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3 years ago