during the flash flood, the water level of a river rises by 10cm every hour. Five hours later,the water level starts to subside by 4 cm every half-hour.If the water level before the flash flood is 12m , determine the water, in m , level of the river 8 hours after the flood.
1. during the flash flood, the water level of a river rises by 10cm every hour. Five hours later,the water level starts to subside by 4 cm every half-hour.If the water level before the flash flood is 12m , determine the water, in m , level of the river 8 hours after the flood.
The answer is , 11,86. Before the flood , the water level is 12m. After 5 hours , the water increases about 0,50m. So, the water level after 5 hours is 12,50m. And then, the water level starts to subside by 4cm ever half-hour. So, after 8 hours, the water level is 11,86. How? 12,50m , the water level after flood, and then, subtract it with 64 cm, which is 0,64 m so, the result is 11,86. Hope this is correct.
2. what safety measures at the field?what safety measures at the traffic light?what safety measures at the kerb?what safety measures at night?what safety measures at a staircase?
Jawaban:
what safety measures at the kerb?
Penjelasan:
3. the desert is the.... place the water level is very low
Jawaban:
The desert is the ofone place the water level is very low
Translate:
Gurun pasir adalah salahsatutempat permukaan air yang sangat rendah
Sekian,, Trkmksh...4. A utility bill showed that 700 littres of water was used by a family of 3 adults in a week. Each member of the family used the same amount of water each day. How many litters of water were used by each person in a day? .... litres *
Jawaban:
Banyak air yang digunakan oleh setiap anggota keluarga per harinya adalah [tex]\[33\frac{1}{3}{\text{ liter}}\][/tex]. Dalam hal ini digunakan konsep pembagian. Kamu perlu menentukan terlebih dahulu banyak air yang digunakan oleh satu keluarga selama satu hari.
Penjelasan:
Oleh karena 700 liter air digunakan selama 1 minggu oleh satu keluarga, maka banyak air yang digunakan selama 1 hari adalah
[tex]\[700{\text{ liter}}/{\text{minggu = }}700{\text{ liter}}/{\text{7 hari = }}100{\text{ liter}}/{\text{hari}}\][/tex]
Catatan: 1 minggu = 7 hari.
Oleh karena ada 3 orang dalam satu keluarga dan setiap anggota keluarga menggunakan banyak air yang sama, maka banyak air yang digunakan oleh setiap anggota per harinya adalah [tex]\[\frac{{100{\text{ liter}}}}{3} = 33\frac{1}{3}{\text{ liter}}\][/tex].
Pelajari lebih lanjut materi tentang pemodelan matematika yang menggunakan konsep pembagian pada https://brainly.co.id/tugas/42698038.
#BelajarBersamaBrainly
5. the desert is the.......place.the water level is very low
the desert is the hotest place. the water level is very low
bisa juga
the desert is the driest place. the wate level is very low
maaf ya kalau misalnya salah :D
The Desert is the a very hot place and the surface of the water is very low
Maaf kalau salah
6. What is scientist? Where are the scientist work? How many money the scientist earn?
Jawaban:
1. A scientist is someone who systematically gathers and uses research and evidence, to make hypotheses and test them, to gain and share understanding and knowledge
2. In universities, government facilities, company labs, for-profit companies, in space, on ships, underground, in hospitals, in private practice and in forests.
3. £47,500.
Penjelasan:
Hope this help ^ ^
7. Tono measures the depth of a pool using a stick. One - quarter of a stick, a length of 24 cm is above the water when the end touches the bottom. How long istthe stick and how deep is the water?
Solution:
the stick length is 96 cm and the water deep is 72 cm.
StepsandExplanation:
one-quater (¼) of a stick which is 24 cm is above the water when end touches the bottom of the pool.
that means ¼ of stick length is 24 cm. if x is stick length, then :
[tex] \frac{1}{4} x = 24 \\ x = 24 \times 4 \\ x = 96[/tex]
the length of the stick is 96 cm.
Which means, the length of the stick under water is the depth of pool. so, the depth of pool :
[tex](1 - \frac{1}{4} ) \times 96 \\ = \frac{3}{4} \times 96 \\ = 72[/tex]
then the depth of pool is 72 cm.
good luck.
8. Mrs Jones is tiling her kitchen floor. Each kitchen tile measures 20cm by 20cm. The floor measures 3m wide and Sm long. The tiles are sold in boxes of 10. Each box costs £6 Work out the total cost of the tiles needed for the kitchen floor.
Penjelasan dengan langkah-langkah:
total tiles needed =
(3m × 5m)/(20cm × 20cm)
= (300×500)/(20×20)
= 150.000/400
= 375 pcs
the boxes of tiles must be bought =
375/10 = 37,5 boxes => 38 boxes
(usually cannot buy half of box)
Totat cost = 38 × £6 = £228
goodluck
9. In a bucket there are 50 liters of water, the water will be transferred into a cube- shaped tub with side length = 50 cm, what is the height of the water level in the tub?
Jawaban:
20 cm
Penjelasan dengan langkah-langkah:
Volume of cube = 50 liter = 50 dm³ = 50.000 cm³
Heigh of cube shaped tub = Volume : side length²
= 50000 : 50 : 50
= 20 cm
10. In Diagram 2, the diameters of a cylindrical jar and a cylindrical container are 3d cm and d cm respectively. The jar contains water to a depth of 12 cm. The water from the jar is poured equally into 6 empty containers. Calculate the height, in cm, of water level of each container.
Jawab:
Penjelasan dengan langkah-langkah:
diameter of Cylindrical Jar (Cj) = 3d cm
diameter of cylindrical container (Cc) = d cm
Height of Cj = 12 cm
Volume Cj = 6 Volume Cc
H Cc = ?
We need to make equation based on the cylinder's volume
since
V cylinder = Ï€r²h
where radian = 1/2 d
therefore,
Volume Cj = 6 Volume Cc
Ï€.(3d/2)².12 = 6.Ï€.(d/2)².h (eliminate Ï€)
[tex]\frac{9d^2}{4} \times 12= 6 \times \frac{d^2}{4} .h\\[/tex]
[tex]\frac{9d^2}{4} :\frac{d^2}{4} \times \frac{12}{6} =h[/tex]
[tex]\frac{9d^2}{4} \times \frac{4}{d^2} \times 2 = h\\h = 9 \times 2 = 18 cm[/tex]
11. governments have taken a lot of measures to stop water ______ (pollute)
governments have taken a lot of measures to stop water (…from)pollute
JAWABAN:the government has taken many steps to stop water ___from___ (pollution)
sorry if the answer is wrong
12. The worker drinks ___________ water. 2 poin many much each every
Jawaban:
The worker drinks MANY water
Maaf kalo ada yang tidak lengkap!Jika berkenan, mohon dijadikan jawaban tercerdasTerima kasih atas Perhatiannya! <3Jawaban:
much/too much
Penjelasan:
water termasuk uncountable noun
13. the diagram below shows a plastic cup floating in a container of water if some marbels are placed in the cup the water level will artinya apa
arti bahasa indonesianya ini :
Diagram di bawah menunjukkan gelas plastik mengambang dalam wadah air jika beberapa marbels ditempatkan dalam cangkir tingkat air akan
14. a scientist conducted an experiment to determine how the amount of salt in the water affects the number of plants that can live in the water. In this experiment the dependent variable is a) the temperature of the water b) the amount of salt in water c) the number of plants in the water d) the water
c. the number of plants in the water
15. The pH level of bottled water is averaged at 6.9 with variance of 0.3, what is the probability of: a)Getting a bottled water with pH level less than 6.5?
Jawaban:
Penjelasan:
[tex]\sigma^2 = 0.3 \to \sigma = 0.548, \mu = 6.9[/tex]
a. X = 6.5 => P(X < 6.5) = ?
[tex]Z = \dfrac{\overline{X}-\mu}{\sigma}\\\\Z = \dfrac{6.5-6.9}{0.548} = -0.73\\\\P(\overline X< 6.5) = P(Z < -0.73)\\\\\text{berdasarkan tabel Z :}\\\\P(Z < -0.73) = 0.2327\\\\\boxed{\boxed{\textbf{\huge{$\boldsymbol{P(\overline X< 6.5) = 0.2327 = 23.27\%}$}}}}[/tex]
16. How The Fresh Water Ecosystem Depend On Each Other
Answer:
They interact with each other and adapt physioligi because all living in freshwater ecosystems are less intensity.
Thanks
17. The scientist visits a volcano/ He climbs to the top *5 pointsThe scientist will visit a volcano, if he climbs to the topIf the scientist visits a volcano, He will climb to the top
Jawaban:
If the scientist visits a volcano, he will climb to the top
18. tono measures the depth of a pool using a stick. One - quarter of the stick a length of 24 cm, is above the water when the end touches the bottom. How long is the stick and how deep is the water?
Solution :
the stick length is 96 cm and the water deep is 72 cm.
Steps and Explanation :
one-quater (¼) of a stick which is 24 cm is above the water when end touches the bottom of the pool.
that means ¼ of stick length is 24 cm. if x is stick length, then :
[tex] \frac{1}{4} x = 24 \\ x = 24 \times 4 \\ x = 96[/tex]
the length of the stick is 96 cm.
Which means, the length of the stick under water is the depth of pool. so, the depth of pool :
[tex](1 - \frac{1}{4} ) \times 96 \\ = \frac{3}{4} \times 96 \\ = 72[/tex]
then the depth of pool is 72 cm.
good luck.
19. a rectangular tank measures 12 cm by 6 cm by 9 cm. It is 1/3 filled with water. Find the volume of water in the tank in millilitres
1 cm = 100 m,
so 12cm is 1200mm
The Volume of the tank
1200*600*900 = a mm^3
Please calculate the multiplication product by yourself, here i wrote as a
20. Over 1 million tourists visit the Leaning Tower of Pisa each year.A. the leaning tower of pisa is visited by over 1 million tourists each yearB. the leaning tower of pisa visitors are over 1 million tourists each yearC. over 1 million tourists are visiting the leaning tower of pisa each year
Jawaban:
c. over 1 million tourists are visiting the leaning tower of pisa each year
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