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Evgesh-ka [11]
3 years ago
8

Last night 30cm of snow fell in 6 hours. If it continues snowing at the

Mathematics
1 answer:
mafiozo [28]3 years ago
5 0

Answer: 9 hrs for 45cm of snow to fall

Step-by-step

If 30cm = 6 hrs

Then divide 30/6 to get the unit rate of the amount of snow per hr

Which is 5/1

So 5cm per hr

Then add 30+5+5+5 to get 45

And since we know 5cm equal 1 hr

Add the original amount of hours which is 6 plus 3 ones

Which is 6+1+1+1

In total, it will take 9 hrs for 45cm of snow to fall.

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A metal hollow bar whose cross section and dimension are shown below weighs 8x10^3 kg/m^3 and measure 2m in length ..determine t
devlian [24]
1) We calculate the volume of a metal bar (without the hole).

volume=area of hexagon x length
area of hexagon=(3√3 Side²)/2=(3√3(60 cm)²) / 2=9353.07 cm²
9353.07 cm²=9353.07 cm²(1 m² / 10000 cm²)=0.935 m²

Volume=(0.935 m²)(2 m)=1.871 m³

2) we calculate the volume of the parallelepiped

Volume of a parallelepiped= area of the section  x length
area of the section=side²=(40 cm)²=1600 cm²
1600 cm²=(1600 cm²)(1 m² / 10000 cm²=0.16 m²
Volume of a parallelepiped=(0.16 m²)(2 m)=0.32 m³

3) we calculate the volume of a metal hollow bar:
volume of a metal hollow bar=volume of a metal bar -  volume of a parallelepiped

Volume of a metal hollow bar=1.871 m³ - 0.32 m³=1.551 m³

4) we calculate the mass of the metal bar

density=mass/ volume  ⇒ mass=density *volume

Data:
density=8.10³ kg/m³
volume=1.551 m³

mass=(8x10³ Kg/m³ )12. * (1.551 m³)=12.408x10³ Kg

answer: The mas of the metal bar is 12.408x10³ kg  or   12408 kg  


4 0
3 years ago
CAN ANYONE PLEASE HELP ME IM ON A TIMED QUIZ PRE CALC!
enot [183]

Help me, help you.

Oh, what you gonna do?

Cuz' I don't got a clue.

No, I ain't no Scooby-doo!

Help me, help you!

Okay, what's up?

7 0
3 years ago
Directions: It’s Friday and you and your friends want to make some pizza. You want to make sure that you get the best deal on in
emmasim [6.3K]

Answer:

Pizza Sauce: Walmart

Pizza Dough: Walmart

The cheapest price for pizza ingredients is at Walmart

Step-by-step explanation:

Pizza Sauce: (Walmart) 24 ÷ 3 = 8 (Grocery outlet) 32 ÷ 2 = 16

Pizza Dough: (Walmart) 6 ÷ 10 = 0.60 (Grocery outlet) 9 ÷ 12 = 0.75

6 0
3 years ago
What is 12m + 12in ?
mafiozo [28]
It is 472.441... cause i kwnon the question from two years ago
3 0
3 years ago
A study in your town found that 54 in 1,762 people have a post office box what percent of the people in town have a post office
gavmur [86]
Multiply 54 times 100 then divide by 1,762

54 times 100= 5400

5400\1,762= .03

which equals to 3%
4 0
3 years ago
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