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iragen [17]
2 years ago
12

What proof do you see that contaminated water seeped into the well? How could scientists use a similar approach to understand wa

tershed in a community?
Emmerson is making a model of a well. He places screen material into a vase. On one side, he adds a layer of aquarium gravel and then tops it with soil. These layers model the rock and soil layers outside the well. Emmerson leaves the space on the other side of the screen empty to model the inside of the well.
Mathematics
1 answer:
Veseljchak [2.6K]2 years ago
6 0

Answer:

because of the fungus that may have growne is the asnwer

Step-by-step explanation:

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I WILL MARK BRAINLIEST
never [62]

Answer:

<h2>61.27cm^2</h2>

Step-by-step explanation:

The tuna can has a shape of a cylinder, and the area of the  tuna lablel is the  lateral surface area of the can

A=2\pi rh

Data

diameter d= 6.5cm

radius r = \frac{diameter}{2}= \frac{6.5}{2} = 3.25cm

height h= 3cm

leteral surface area

A=2*3.142*3.25*3\\= 61.269\\=61.27cm^2

3 0
3 years ago
Can someone help me with part b?
Tema [17]

Step-by-step explanation:

the average rate of change of a function f in an interval [x-low, x-high] is

(f(x-high) - f(x-low)) / (x-high - x-low)

the year 2000 means t = 2000-1980 = 20

the year 2015 means t = 2015-1980 = 35

so, we have

(A(35) - A(20)) / (35 - 20)

((-0.6(35)² + 37.2×35 + 243) - (-0.6(20)² + 37.2×20 + 243)) / 15

((-735 + 1302 + 243) - (-240 + 744 + 243)) / 15

(810 - 747) / 15 = 63/15 = 4.2

the average change rate between 2000 and 2015 is 4.2.

that means that the use of nuclear energy in the USA increased by 4.2 billions of kilowatt hours per year during that period.

3 0
3 years ago
A stretched spring has a length of 12 inches when a weight of 2 lbs is attached to the spring. The same spring has a length of 1
Advocard [28]
The way I figured this one out was saying that if it takes 2lbs to stretch it to 12 inches and 5lbs to stretch to 18 inches that means that 3 additional pounds = 6 inches. Therefore, each additional pound is 2 inches. We know already that with 2 lbs it was 12 inches in length and we can also say that 2 lbs = 4 inches. So subtract 4 from 12 and you end up with the answer of 8 inches. 
8 0
3 years ago
A rhombus has sides 11cm long the shorter diagonal of the rhombus is 8cm long find the size of the smaller angles of the rhombus
ZanzabumX [31]

Answer:

42.64°

Step-by-step explanation:

Note: A rhombus has all its sides equal, its opposite angle are equal, its  has bigger and smaller diagonal, diagonal bisect the angles and diagonal bisect each other.

From the diagram attached,

sinθ = opposite/adjacent

sinθ  = 4/11

θ = sin⁻¹(4/11)

θ = 21.32

Therefore, from the diagram,

The smaller angle of the rhombus = 2θ

The smaller angle of the rhombus = (2×21.32)

The smaller angle of the rhombus = 42.64°

8 0
3 years ago
Evaluate the expression without using a calculator.<br> In1/e^7
Sati [7]

Answer:

-7

Step-by-step explanation:

ln(\frac{1}{e^7})\\=ln(e^{-7})\\  =-7ln(e)\\=-7

8 0
3 years ago
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