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melamori03 [73]
2 years ago
7

Help Plz :) Hehehehehehehee

Mathematics
1 answer:
netineya [11]2 years ago
7 0

Answer:

Step-by-step explanation:

.

.

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The table shows the estimated number of bees, y, in a hive x days after a pesticide is released near the hive.
Oksana_A [137]

Answer:

<h2>A.</h2>

Step-by-step explanation:

The given table is

Days     Bees

  0        10,000

 10        7,500

 20       5,600

 30       4,200

 40       3,200

 50       2,400

Where x represents days and y represents bees.

The exponential function that models this problem must be like

y=a(1-r)^{x}, which represenst an exponential decary, because in this case, the number of bees decays.

We nned to use one points, to find the rate of decay. We know that a=10,000, because it starts with 10,000 bees.

Let's use the points (10, 7500)

y=a(1-r)^{x}\\7500=10000(1-r)^{10}

Solving for r, we have

\frac{7500}{10000}=(1-r)^{10} \\(1-r)^{10} =0.75

Using logarithms, we have

ln((1-r)^{10}) =ln(0.75)\\10 \times ln(1-r)=ln(0.75)\\ln(1-r)=\frac{ln(0.75)}{10} \approx -0.03\\e^{ln(1-r)}=e^{-0.03}\\1-r =e^{-0.03}\\r=-e^{-0.03}+1 \approx 1.97

Replacing all values in the model, we have

y=10000(1-1.97)^{x}\\y=10000(0.97)^{x}

Therefore, the right answer is the first choice, that's the best approximation to this situation.

6 0
2 years ago
Read 2 more answers
If x + 5y = -11 and 2x − 3y = 17, what is the value of x + y?
aev [14]
X+5y=-11 (1)
2x-3y=17 (2)

2(1)-(2)
2x+10y-2x+3y=-22-17
13y=-39
y=-3

Sub y=-3 in (1)
x+5(-3)=-11
x=4

So x+y= -3+4 =1



6 0
3 years ago
What is the value of y if f||n<br> ?????
Elenna [48]

Answer:

y = 148°

Step-by-step explanation:

4x - 18 = 2x + 12 (alternate exterior angles are congruent)

Collect like terms

4x - 18 = 2x + 12

4x - 2x = 18 + 12

2x = 20

Divide both sides by 2

x = 10

y = 180 - (2x + 12) (linear pair theorem)

Plug in the value of x

y = 180 - (2(10) + 12)

y = 180 - (20 + 12)

y = 148°

5 0
3 years ago
Will mark most brainly
tekilochka [14]

Answer:

19 and 157

Step-by-step explanation:

5 0
2 years ago
I need help with my math!!!!!!!
olga_2 [115]

Answer:

2\sqrt{6}

Step-by-step explanation:

Area of a square = s^{2}   (<em>s is a side length)</em>

<em>24 = </em>s^{2}

\sqrt{24} = \sqrt{s^{2} }

\sqrt{24} = <em>s</em>

\sqrt{(4)(6) } = <em>s</em>

<em>2</em>\sqrt{6} = <em>s</em>

7 0
3 years ago
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