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faltersainse [42]
3 years ago
9

The cost of mining gold for a mining company is $920 per gram.How much will it cost the company to mine 0.2 kilograms?

Mathematics
1 answer:
Aneli [31]3 years ago
3 0

Answer:

$184

Step-by-step explanation:

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In a whole 40% is 1380 what does the other 60% equal
Karolina [17]
If you divide 2380 by 4, it will give you 10% of the whole:

1380/4=345

Then you can times 345 by 6 To find the 60%:

345*6=2070

PS Please check my calculations with a calculator as I worked these out in my head.
5 0
3 years ago
A closed can, in a shape of a circular, is to contain 500cm^3 of liquid when full. The cylinder, radius r cm and height h cm, is
Gemiola [76]
To express the height as a function of the volume and the radius, we are going to use the volume formula for a cylinder: V= \pi r^2h
where
V is the volume 
r is the radius 
h is the height 

We know for our problem that the cylindrical can is to contain 500cm^3 when full, so the volume of our cylinder is 500cm^3. In other words: V=500cm^3. We also know that the radius is r cm and height is h cm, so r=rcm and h=hcm. Lets replace the values in our formula:
V= \pi r^2h
500cm^3= \pi (rcm^2)(hcm)
500cm^3=h \pi r^2cm^3
h= \frac{500cm^3}{ \pi r^2cm^3}
h= \frac{500}{ \pi r^2}

Next, we are going to use the formula for the area of a cylinder: A=2 \pi rh+2 \pi r^2
where
A is the area 
r is the radius 
h is the height

We know from our previous calculation that h= \frac{500}{ \pi r^2}, so lets replace that value in our area formula:
A=2 \pi rh+2 \pi r^2
A=2 \pi r(\frac{500}{ \pi r^2})+2 \pi r^2
A= \frac{1000}{r} +2 \pi r^2
By the commutative property of addition, we can conclude that:
A=2 \pi r^2+\frac{1000}{r}
7 0
3 years ago
Which of these expressions can be used to calculate the monthly payment for
skad [1K]

Answer:

m=(r/n)+0.114r

Step-by-step explanation:

m=monthly payment

r=remaining amount

n=# of months remaining

3 0
3 years ago
Work out the area of a rectangle with base, b = 14mm and perimeter, P = 30mm
nataly862011 [7]

Answer:

14 mm squared is the area

Step-by-step explanation:

3 0
2 years ago
What is the value of x?<br> 4. = 50-12<br> Enter your answer in the box.<br> x =
Dimas [21]
The question doesn’t make much sense. Do you mean x=50-12? If so, x=38
3 0
2 years ago
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