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Ratling [72]
3 years ago
6

Can someone please help my friend with her homework?? Thank youuuu <3

Mathematics
1 answer:
snow_tiger [21]3 years ago
5 0
1. 1      2. 1 and 1/2      3. 1 and 2/3     4. 1 and 1/4    5. 1 and 4/5   6.  1 and 4/6
7. 3   8. 35/8    9.  7/2    10.  7/3     11.  39/4     12. 3 and 1/4, 3 and 1/3, 3 and 7/8 
13. 2 and 1/9, 2 and 1/4, 2 and 3/5    14.  1 and 2/3, 1 and 3/5, 1 and 1/5 
15.  5 and 4/5, 5 and 3/5, 5 and 1/9
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12. Find the surface area of each figure to the nearest tenth.
Zolol [24]

Answer:

  12a. 471.2 cm²

  12b. 60 m²

Step-by-step explanation:

Part A.

The surface area of each figure is the sum of the end area and the lateral area.

  <u>cylinder</u>

  S = (2)(πr²) +2πrh = 2πr(r +h)

  S = 2π(5 cm)(5 cm +10 cm) =150π cm² ≈ 471.2 cm²

__

  <u>triangular prism</u>

  S = (2)(1/2)bh + PL . . . . b=triangle base; h=triangle height; P=triangle perimeter; L=length of prism

  S = (4 m)(1.5 m) + ((4 + 2·2.5) m)(6 m) = (6 + 54) m² = 60 m²

_____

Part B.

Surface area is useful in the real world wherever products are made from sheets of material or wherever coverings are applied.

Carpeting or other flooring, paint, wallpaper are all priced in terms of the area they cover, for example.

The amount of material used to make containers in the shapes shown will depend on the area of these containers (and any material required for seams).

6 0
2 years ago
Terry spent $33.25 to have 475 fliers printed for his business. What was the cost of a single flier?​
Elanso [62]

Answer:

Step-by-step explanation:

divide 33.25/475 and you'll get 7 cents per flier

4 0
2 years ago
Some kids are selling lemonade for $1.50 per cup at a high
BaLLatris [955]

A function that would represent profit based on the number of cups of lemonade is Profit = 1.5n - 14

<u>Solution:</u>

Given, Some kids are selling lemonade for $1.50 per cup at a high school baseball game.  

They spent $14 on all of the items needed for the lemonade stand (cups, lemonade, table oth, sign, etc)

We have to create a function that would represent profit based on the number of cups of lemonade

Now, let the number of cups sold be "n"

Then , we know that,<em> profit = selling price – cost price  </em>

Profit = number of cups sold x price per cup – cost price

Profit = n x $ 1.5 – $ 14  

Profit = 1.5n – 14

Hence, the function is Profit = 1.5n - 14

6 0
2 years ago
Translate "the product of z,x, and y"<br> into a mathematical expression
Nataliya [291]

z*x*y

Product means multiply

5 0
3 years ago
Read 2 more answers
6 * ( 12 - 7.5 ) - 7
Paladinen [302]

Answer: 20

Explanation: Alright, so basically you’re going to want to use PEMDAS (Parenthesis, Exponents, Multiplication/ Division, Addition/ Subtraction)

* just means multiply.. sooo the problem looks like this:

6x(12-7.5)-7

We’ll start at the parentheses :)

So (12-7.5) = 4.5

Now our problem looks like: 6x(4.5)-7

Following PEMDAS, the next thing to come up is multiplication! So we’re going to multiply 6 by 4.5 ...

6x4.5=27

After this our problem looks like: 27-7

So now it’s just simple math...

27-7= 20

5 0
3 years ago
Read 2 more answers
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