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raketka [301]
3 years ago
12

13. How many television sets

Mathematics
1 answer:
Igoryamba3 years ago
4 0

Answer:

15400

Step-by-step explanation:

idk this all i got

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A pond has 150 fish and the population decreases by 8% each day. How many days before there are 30 fish
nlexa [21]

Answer:

19 days

Step-by-step explanation:

Given

a = 150 --- initial

r = 8\% -- rate

Required

Days when the fish gets to 30

The function is exponential and as such it follows;

y = ab^x

Where x represents the number of days and y the number of fishes

Because the fishes decreases;

b = 1 - r

So, we have:

b = 1 - 8\%

Express as decimal

b = 1 - 0.08

b = 0.92

In y = ab^x

a =150

y = 30

b = 0.92

So, we have:

30 = 150 * 0.92^x

Divide both sides by 150

0.2 = 0.92^x

Take log of both sides

log(0.2) = log(0.92^x)

Apply law of logarithm

log(0.2) = x\ log(0.92)

Make x the subject

x = \frac{log(0.2)}{log(0.92)}

x = \frac{-0.6990}{-0.0362}

x = 19.309

x \approx 19

<em>Hence, it takes approximately 19 days</em>

3 0
3 years ago
What's the sum of 5 feet 9 inches in 12 ft and 3 in
galben [10]
First convert everything into inches.

1 foot = 12 in
5 feet = 5*12 = 60 in
12 feet = 12*12 = 144 in

Now add them together

60 + 9 + 144 + 3 = 216 in

or

18 feet

Hope this helps :)
4 0
3 years ago
There are 30 flavors and you can mix up to 3 of them. How many flavor possibilities are there? You can't mix the same flavors mo
miv72 [106K]
If there are 30 flavors and you can have three of them then it is 30^3 who's his 2700 I think that is correct
I hope that is helpful
5 0
3 years ago
Read 2 more answers
A person of height 1.6m up to the eye level is standing at a point 2m away from the bank of the river and found an angle of elev
natima [27]

Step-by-step explanation:

tan30° = Height of person / (Distance away from river bank + river's width) = 1/√3.

Therefore 1.6m / (2m + x) = 1/√3

By cross multiplication, 1.6√3 = 2 + x.

Hence, x ≈ 0.77m.

5 0
3 years ago
7.2x10⁷ = (2x10⁴) (3.6x10^n) what is the value of N​
mash [69]

Answer:

The N value represents a standard value of energy required to penetrate 30 cm into soil by percussion drilling. It is standardized as the energy of a falling hammer from a height of 0,76 m.

Step-by-step explanation:

3 0
3 years ago
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