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Leni [432]
3 years ago
8

YOOOO I NEED HELP on this too and do these

Mathematics
2 answers:
Mrrafil [7]3 years ago
5 0

Answer:

Step-by-step explanation:

9.) Surface Area of Cylinders: A=2πrh+2πr^2

A=2πrh+2πr^2

A=2(3.14)(12)(9)+2(3.14)(12)^2

A = 678.24 + 904.32

A ≈ 1582.56

Rus_ich [418]3 years ago
3 0

Answer:

8. 504ft²

9. 4970yd² (rounded to 3 s.f.)  

Formulas (For easy reference):

Area of rectangle = length × breadth

Area of circle = pi×r×r

Circumference of circle = pi×r×2

-----------------------------------------------------------------------------------------------------------

Step-by-step explanation:

8. You know a box has 6 sides, and there are 3 types of surfaces that are different from each other, and you have to multiply each side by 2 cus there are the front and backside (You can draw the box with its dimensions to see the 3 types of surfaces and why I multiplied by 2):

(2×12×6) + (2×12×10) + (2×6×10) = 144 + 240 + 120

                                                   = 504ft²

9. The net of a cylinder contains two circles of radius 24yd and one long sheet to wrap around the circles with the length that is the circumference of the circle (so that it can wrap around the two circles) and a width which is the height of the cylinder (9yd).

2 Circles = 2×pi×24×24

                = 1152pi

Long sheet = 9×24×2×pi

                   = 432pi

Now we can add all of them together:

432pi+1152pi = 1584pi

                      = 4970yd² (rounded to 3 s.f.)

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5/2

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One serving of Gooey Gushers provides 12% of the daily value of vitamin C. Tim ate 312 servings of Gooey Gushers.
Studentka2010 [4]

Answer:

a) Given expression,

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Since 100% of 312 = 312

⇒ 10% of 312 = 31.2,

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=\frac{12\times 312}{100}

=\frac{3744}{100}

= 37.44,

Hence, the question can be asked about the total amount of the vitamin C.

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What makes this equation true?<br><br> -2n + 1.8 = 3.2<br><br> Im so confused
fenix001 [56]

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Step-by-step explanation:

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A-Town wants to know the number of cell phones in each household the town divides the population up by neighborhood and surveys
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Leokris [45]

<u>Picture 1:</u>

To figure this out, notice the pattern happening on x. It's simply counting to four, so the first blank is 1 and the next is 2.

The y coordinates seem to be going up by 9. 27 plus 9 is 36, so the answer to the fourth box is 36.

Another way to see how this is correct is to notice that the x is multiplying by 9 to get y. It works out as you look at it and plug it in!

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