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]
2 years ago
5

(Answer with steps please)

Mathematics
1 answer:
77julia77 [94]2 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
a rectangle room has an area of 400 square feet. the length is 7 feet less than twice the width. find the dimensions of the room
Arte-miy333 [17]
2800 x 7 That’s what I’m guessing
3 0
3 years ago
What is the area of the kite 10 12 12 18
Brums [2.3K]
P=2A
q so it’s 18
That is the answe
8 0
2 years ago
The polynomial 2x^3 + 9x^2 + 4x - 15 represents the volume in cubic feet of a rectangular holding tank at a fish hatchery. The d
alina1380 [7]
For part A: you will get 3 linear factors (as the degree of the polynomial is 3). perform the division using (x-1) as your known factor and you will get (x-1)(2x²+11x+15). you can then factor the (2x²+11x+15) to get 2x^3 + 9x^2 + 4x - 15 = (x-1)(2x+5)(x+3) 
for part B: since 2x+5 will provide the greatest value (assuming x>0) of the 3 factors, then 2x+5=13. solve to get x=4. if x is 4, then the dimensions are 3'x13'x7' [just sub 4 into the x's for each factor] 
for part C: as to the graphing calculator, I don't have one. However, if you solve each linear factor for when it is 0, those values will be the x-intercepts. So your graph should cross the x-asix at 1, -5/2, and -3 
4 0
3 years ago
Write the 3 digit number that answers the riddle? I have the same hundreds digit as the ones digit. The value of my tens digit i
jok3333 [9.3K]
<span>The answer is 454. Since the value of the ones digit is 4, the last digit is a 4. Next, since the ones digit is the same as the hundreds digit, the first digit would be 4. Finally, the middle digit is the tens place and would be 5 since the tens digit is 50.</span>
4 0
2 years ago
Read 2 more answers
Joe told Mickey he got an hourly raise at work and his new rate will be $10.25 per hour. Mickey wants to know what Joe’s hourly
insens350 [35]
<span>Joe got an hourly raise at work and his new rate will be $10.25 per hour. 
</span>If r represents the amount of the raise, then the following equation can be written:
X=10.25-r
where X is <span>Joe’s hourly rate was before his raise.
Joe was paid (10.25-r) USD per hour before he got a raise.</span>
3 0
3 years ago
Read 2 more answers
Other questions:
  • Giving brainlist so plzzzz help tysm if u help
    9·1 answer
  • £440 is divided between David, Mark &amp; Henry so that David gets twice as much as Mark, and Mark gets three times as much as H
    15·1 answer
  • The difference between the record high and low temperatures in Daytona Beach, Florida, is 87° F. The record high temperature is
    6·1 answer
  • What's the single exponent for K^8 x K^9
    13·1 answer
  • Please help me with this!!!!
    5·2 answers
  • Is 7/8 or 11/10 closer to 1? How did you decide anybody help please?
    13·2 answers
  • Which situation represents linear proportional relationships
    9·1 answer
  • Suppose T is a transformation from ℝ2 to ℝ2. Find the matrix A that induces T if T is reflection over the line y=1/2x
    10·1 answer
  • When we take a census, we attempt to collect data from (a) a stratified random sample. (b) every individual selected in an SRS.
    12·1 answer
  • Marie bought a shirt on sale. The original price of the shirt was $40. What is the sale price of the shirt after a 20% discount?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!