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qwelly [4]
3 years ago
5

A wheel has a diameter of 21 inches. About how far does it travel if it makes 30 complete revolutions?

Mathematics
1 answer:
Lelu [443]3 years ago
4 0
3 multiplied by 20 is 60

Multiply this by 10 and you get 600

1 Multiplied by 30 is 30

Find the total of the two answers (Which is 630) this is your answers
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This is the formula for a triangle base

b=2A
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7 0
2 years ago
For the reaction 2Fe + O2 → 2FeO, how many grams of iron oxide are produced from 42.4 mol of iron?
Butoxors [25]

In the balanced reaction

2 Fe + O₂   →   2 FeO

2 moles of iron (Fe) react with 1 mole of molecular oxygen (O₂) to produce 2 moles of iron oxide (FeO). The ratio of Fe to FeO is 1-to-1, so if one starts with 42.4 mol of Fe, one will end up with the same amount of FeO, 42.4 mol.

Look up the molar mass of Fe and O:

• Fe = 55.845 g/mol

• O = 15.999 g/mol

Then the molar mass of FeO is approximately 71.835 g/mol, and so the mass of 42.4 mol of FeO is

(42.4 mol) × (71.835 g/mol) ≈ 3050 g

8 0
2 years ago
A street that is 360 feet long is covered in snow city workers are using a snow plow to clear the street a tire on the snow plow
belka [17]

Answer:

Radius of tire=0.58 meter

Step-by-step explanation:

as we know that the

Circumference of the tire=2*3.14*r

and it needs to rotate 30 times to cover the street distance of 360 feet

So, the below equation would be used to find the radius of tire in the meters

360/3.28084=30*2*3.14*r

r=0.5824203822 meters

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3 0
2 years ago
PLS HELP ASAP!! WILL MARK BRAINLYIST
son4ous [18]

Answer:

$39,851.25

Step-by-step explanation:

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109% in decimal form = 109/100 = 1.09

Therefore, the exponential function is:

y = 20000 \cdot 1.09^x, where x is the number of years

So when x=8,  

y = 20000 \cdot 1.09^8=39851.252...

After 8 years, annual sales = $39,851.25

7 0
2 years ago
A store sells 8 cans of soup for ​$22. How much would it cost you to buy 9 cans of soup​?It would cost ​$nothing.
puteri [66]
$24.75

this is because 22 ÷ 8 × 9 is equal to 24.75
this is the correct answer
6 0
3 years ago
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