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Nonamiya [84]
3 years ago
14

The amount of water in a lake decreased by 12.8 feet over the last 4 weeks. How much did the water level change by each week?

Mathematics
1 answer:
Keith_Richards [23]3 years ago
8 0

Answer:

3.2 feet.

Step-by-step explanation:

Since the total amount of water that was decreased is equal to 12.8, we would divide it by 4 to see how much it decreased in 1 week assuming it was constant. So, 12.8 divided by 4 is 3.2.

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35. Para pintar una casa se mezclaron 5/4 L do pintura blanca y 1/2 L de pintura azul. Al final solo se emplearon 213 L de la me
maw [93]

Answer:

Total paint left over = \frac{13}{12}L

Step-by-step explanation:

Given - To paint a house, 5/4 L of white paint and 1/2 L of blue paint

             were mixed. In the end only 2/3 L of the mixture were used.

To find - How many liters of paint were left over ?

Proof -

Given that,

5/4 L of white paint and 1/2 L of blue paint were mixed.

So, total mixture = (\frac{5}{4} + \frac{1}{2})L

                          = \frac{5 + 2}{4}L

                          = \frac{7}{4}L

⇒Total mixture =  \frac{7}{4}L

Now,

Given that ,

In the end only 2/3 L of the mixture were used.

So, total mixture left = (\frac{7}{4} - \frac{2}{3})L

                                = \frac{21 - 8}{12}L

                                = \frac{13}{12}L

∴ we get

Total paint left over = \frac{13}{12}L

6 0
3 years ago
HIIIIII 2 QUESTIONS IN THE 2 PICS HELP PLS
skelet666 [1.2K]

Answer:

(1)C- Trapezoid

(2)D-20 square feet

Step-by-step explanation:

<u>Question 1</u>

A cross-section of a rectangular pyramid cut perpendicular to the base but not passing through the top will have two parallel sides where one of the sides will be longer. Therefore, the shape which describes the cross-section will be a trapezoid.

<u>Question 2</u>

The base of the Triangle = 5 feet

Height of the Triangle = 8 feet

\text{Area of a triangle}=\dfrac12 \times $Base  \times Height\\=\dfrac12 \times 5  \times 8\\=20 ft^2

3 0
4 years ago
Anyone help?<br><br> What is the derivative of x^2 + 2x - 4?<br><br> Thanks!
castortr0y [4]
Let's take the derivative of each term one by 1

x^2
Apply the power rule for derivatives.
2x^(2-1) = 2x
You get 2x.

2x
Apply the power rule (x^1) and the constant multiple rule.
2 * x^(1-1) = 2 * x^0 = 2
You get 2.

-4
The derivative of a constant is 0.

Put that together and you get 2x + 2

Have an awesome day! :)
4 0
3 years ago
Read 2 more answers
An Inscribed angle with a diameter as a side has measure x degrees ? If the ratio of m overline AD to mDB is 1:4, what is mDB? (
Neko [114]

Answer:

144

Step-by-step explanation:

8 0
3 years ago
Can someone please help me?
I am Lyosha [343]
I used to look at the examples i can’t remember now what it is but look at the examples
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