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Yuri [45]
3 years ago
8

Select all the correct answers.

Mathematics
1 answer:
rusak2 [61]3 years ago
5 0

Answer:

a & c

Step-by-step explanation:

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The population of a country was increased in the past 4 years. The annual presentage increases are 20%,25%,30%,10% respectively.
Vladimir79 [104]

The answer is 114.5%.

Let the original population be denoted by x.

Now, let's go through the percentage increase per year.

<u>Year 1</u>

  • x (1 + 20%)
  • x (1.2)
  • 1.2x

<u>Year 2</u>

  • 1.2x (1 + 25%)
  • 1.2x (1.25)
  • 1.5x

<u>Year 3</u>

  • 1.5x (1 + 30%)
  • 1.5x (1.3)
  • 1.95x

<u>Year 4</u>

  • 1.95x (1 + 10%)
  • 1.95x (1.1)
  • 2.145x

Overall increase : 214.5% - 100% = 114.5%

Hence, the overall percentage increase in these 4 years is 114.5%.

7 0
2 years ago
I need help with my math
Nat2105 [25]

Answer:

Part A. C=9

Part B. (w+3)² =139

Part C. w = 8.8 inch

Step-by-step explanation:

Given from the question length of the the picture = (2w+12) inches

Width of the picture = w inches

Area of the picture = 260 inch²

Part A. Area of the picture with the given dimensions= w×(2w+12)

Or w(2w+12) = 260

2w²+12w = 260

2(w²+6w) = 2×(130)

w²+6w = 130

Or w²+6w +9 = 130+9 ⇒ which is in the form of w²+6w+c = 130+c

Therefore for c = 9 we will get a perfect square trinomial.

Part B. As we have seen the equation in part A.

As required equation will be (w+3)²=139

Part C. Since (w+3)² = 139

Then by taking under root on both the sides of the equation

(w+3) =√139 = 11.8

(w+3)-3=11.8-3

w = 8.8 inch

3 0
3 years ago
Write a model for the statement V varies jointly as h and the fifth power of r. Group of answer choices LaTeX: V=khr^5 V = k h r
hjlf

Answer:

Option A)

V = khr^5

Step-by-step explanation:

We are given the following in the question:

V varies jointly as h and the fifth power of r.

V\propto h\\V\propto r^5

Combing the two equations, we get,

V\propto hr^5

Now, removing the sign of proportionality and adding the constant of proportionality, we get,

V = khr^5

where k is the constant of proportionality.

Thus, the correct answer is

Option A)

V = khr^5

7 0
3 years ago
How do you convert between fractions, decimals, and percentages?
svlad2 [7]
To convert to percent from fraction you divide the numerator by the denominator. from percent to decimal you move two decimal places to the left.
5 0
3 years ago
Read 2 more answers
A=1/2 bh (base/height)<br> =.5(12)4<br> a=24ft<br> how did i get the answer a=24?
vampirchik [111]
That’s what i got
step by step explanation
4 0
2 years ago
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