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Marrrta [24]
2 years ago
7

Find the total surface area of each of the following cylinders.

Mathematics
1 answer:
zhuklara [117]2 years ago
5 0

Answer:

272\pi

Step-by-step explanation:

Area of Circle =

\pi   {r}^{2}  \\ r \:  =  \frac{8}{2} = 4 \\ \pi {4}^{2}   = 16\pi

Circumference =

\pi d \\ 8\pi

SA =

2(16\pi) + 30(8\pi) = 272\pi

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chelsea deposits $600 into a bank account and is earning simple interest.After 4 years her account has a balance of $621.60.If C
olga nikolaevna [1]
If she deposited $600 and had $621.60 after four years, then she earned: $621.60 - $600 = $21.60 in four years. It means in one year she earned $21.60 ÷ 4 = $5.40. Now we have to find out how many percent of $600 is $5.40:

$5.40 = x% from $600
5.4 = x/100 * 600
5.4 = 600x/100                 / * 100 (both sides)
540 = 600x                       / ÷ 600 (both sides)
x = 0.9

So the interest rate was 0.9% annually.

Now we have to find out how much is 0.9% from $1100:

$1100 * 0.9% =
= 1100 * 9/1009 =
= 9900/1000 =
= 9.9

It means in one year she would earn $9.90. After 7 years she would earn $9.90 * 7 = $69.30, so she would have in her account:

$1100 + $69.30 = <u>$1169.30</u>
8 0
3 years ago
James deposited $575 into a bank account that earned 5.5% simple interest each year. If no money was deposited into or withdrawn
Basile [38]
The answer is $654.06.
5.5% of $575 is $31.63.  575 x 0.055 = 31.63
This means that in one year he earns $31.63. In two years it will be $63.25 (31.63 x 2 = 63.25)
Then in half a year it will be $15.81 (31.63/2 = 15.81)
Finally add 15.81 and 63.25 to get $79.06 which you then add to the initial $575 to get the total amount earned in 2 1/2 years which is $654.06.
6 0
2 years ago
Read 2 more answers
It is hard to calculate the volume of a mountain but several estimates put the volume of Mount Everest at around 2,413 cubic kil
scoray [572]

Answer:

About 609,000 Cowboy stadiums could fit inside of Mount Everest

Step-by-step explanation:

we have

The estimate volume of Mount Everest is at around 2,413\ km^{3}

The Dallas Cowboys Stadium has a volume of 140,000,000\ ft^{3}

step 1

Convert ft³ to km³

we know that

1 km=3,280.84 ft

so

140,000,000\ ft^{3}=140,000,000*(1/3,280.84)^{3}=0.003964\ km^{3}

step 2

To find how many Cowboy stadiums could fit inside of Mount Everest, divide the volume of Mount Everest by the volume of the Dallas Cowboys Stadium

2,413/0.003964=608,729

Round to the nearest Thousands

608,729=609,000

The volume of Mount Everest is about 609,000 times greater than the volume of the Dallas Cowboys Stadium

8 0
2 years ago
There are 25 students on the school bus, 5 girls and 20 boys. What is the ratio
Zepler [3.9K]

Answer:

1:4

Step-by-step explanation:

5 0
3 years ago
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Find the GCF of 2yz and 8yz.
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2 years ago
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