1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Sophie [7]
3 years ago
5

(Answer with steps please)

Mathematics
1 answer:
77julia77 [94]3 years ago
4 0

Answer:

Step-by-step explanation:

a). Total surface area of cylinder is defined by sum of curved surface area and surface area of the top and bottom.

Total surface area = 2πrh + 2πr²

Skateboarders use a half pipe structure which are not closed at the ends.

Therefore, curved surface of the half pipe = \frac{2\pi rh}{2}

                                                                      = πrh

b). If r = 2.5 m and h = 9 m,

Curved surface area of the half pipe = π(2.5)(9)

                                                             = 70.69 m²

                                                              ≈ 71 m²

You might be interested in
Help, I need help on this question.
Gnom [1K]

(152.75 - 47) ÷ 11.75

7 0
3 years ago
4(c-3)=8<br> what does c equals?<br> correct answers ONLY please
rodikova [14]
Is there like a picture or something?
5 0
3 years ago
Read 2 more answers
Solve for x.<br> Sqrt8 (Sqrt2 - x) = 11
Alexus [3.1K]

Answer:\frac{-7\sqrt{2} }{4}

Step-by-step explanation:

So first, let's get rid of the parentheses. We can multiply it out to get \sqrt{16}-x\sqrt{8} =11. We know that the square root of 16 is ±4, so now our equation is ±4 - x\sqrt{8}=11. I'm guessing since the problem only has one solution it's most likely only positive 4, so let's revise our equation to 4 - x\sqrt{8}=11. We can use inverse operations to make the a little easier to solve: -7= x\sqrt{8}. We divide both sides by \sqrt{8} to get \frac{-7}{\sqrt{8} } =x, which we can rationalize (remove the square root from the denominator so that it's a proper answer) by multiplying by \frac{\sqrt{8} }{\sqrt{8} } (which is equal to one so we can use it) which is equal to \frac{-7\sqrt{8} }{8}. Let's finish this by simplifying it. \sqrt{8} =2\sqrt{2} (2x2^{2}). We can simplify it further by simplifying the 2, making it \frac{-7\sqrt{2} }{4}.

Hope this wasn't too confusing! I'll answer any questions.

8 0
2 years ago
Read 2 more answers
Through: (3, -5) and (0, -2) <br><br><br>please add the steps please.​
Vlad [161]
1: -5 = 3m + c
2: -2 = 0 + c

From equation 2, we knew c = -2
So we sub into equation 1 and got the value of m

-5 = 3m - 2
m = -1

The equation of line is y = -x - 2
7 0
2 years ago
ASAP HELP ME plz wit this
Lina20 [59]

Answer:

Step-by-step explanation:What??

5 0
2 years ago
Other questions:
  • find the present value of an investment that is worth $19,513.75 after earning 3percent simple interest for 5.5 years
    7·1 answer
  • There are___puppies that weigh less than 102 g
    10·1 answer
  • if a 6 ft tall tent cast a 10 ft long shadow the how long is the shadow that a 9 ft tall adult elephant casts? show work
    12·2 answers
  • Help quick The engineers designing the All Aboard Railroad between Boca Raton and Jupiter decide to create parallel tracks throu
    11·1 answer
  • – 2(– 3х + 4) + 3x — 3 = — 29
    12·2 answers
  • Solve for x2:<br><br> y2 − y1 = m(x2 − x1)<br><br><br> this is literal equations btw
    14·2 answers
  • Is 8-6x+x^2 in standard form
    8·2 answers
  • When x &gt; 0 and a is a postive integer, the expression (5x)^a/3 is equivalent to?
    6·2 answers
  • What are the intercepts for the equation? Select all that apply. x - 3y = 6 *
    12·1 answer
  • Only questions 2, 3, 6, 11, 12, 13 fifth grade
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!