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inn [45]
2 years ago
12

8. What fraction is located halfway between 0 and 2 4

Mathematics
1 answer:
hichkok12 [17]2 years ago
6 0
1/4 or 1/2 I’m not sure though
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Officials begin to release water from a full man-made lake at a rate that would empty the lake in 10 weeks, but a river that can
Romashka [77]

Answer:

It takes 20 weeks to empty the lake

Step-by-step explanation:

Some rate, let's call it R_{empty} empties the lake in 10 weeks and a river (with rate R_{river} can fill the lake in 20 weeks. The idea behind the solution of this type of problem is always set the rate to the same units. Let's see this:

R_{empty}=\frac{1\ lake}{10\ weeks} which implies that this rate empties 0.1 of the lake per week, thus, R_{empty}=0.1/week.

Using the same idea, we can obtain that the filling rate of the river is:

R_{river}=\frac{1\ lake}{20\ weeks} = 0.05 /week

Since both rates are acting at the same time, the total rate of flowing water (either in or out the lake) would be given by:

R_{total}=R_{empty}+R_{river}\\R_{total}= -0.1 + 0.05=-0.05/week, which means that the lake is being empty at a rate of -0.05 week and using the rule of three:

\frac{0.05}{1} = \frac{1}{total\ of\ weeks}  \\total\ of\ weeks = \frac{1}{0.05}=\frac{1}{\frac{1}{20} }\\  total\ of\ weeks = 20

Thus, It takes 20 weeks to empty the lake.

5 0
3 years ago
7th grade math again ​
Sergio [31]

Answer: pi

Step-by-step explanation:

Formula for circumference = 2 x pi x radius

Formula for diameter = 2 x radius

Plug in 6.25 for radius

Circumference = 2 x pi x 6.25

Diameter = 2 x 6.25

Find ratio by diving Circumference over Diameter:

(2 x pi x 6.25) / (2 x 6.25)

Simplify: answer is pi

could also be 3.14

6 0
2 years ago
Does this polygon have point symmetry?
Yuliya22 [10]
I’m pretty sure it’s yes.
4 0
3 years ago
Question 1
Nadya [2.5K]

Answer:

x=3

Step-by-step explanation:

slope: (y² - y¹) / (x² - x¹)

(3, 0) & (3, 1)

(1 - 0) / (3 - 3) = 1 / 0

undefined = vertical line

4 0
3 years ago
Read 2 more answers
Andrew collects stamps and bought 12 sheets of presidental stamps at the post office. Each sheet has 8 rows of 9 stamps. How man
svet-max [94.6K]
Each Sheet = 9x8 = 72 stamps per sheet

72 x 12 = 864 stamps bought
5 0
3 years ago
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