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
Likurg_2 [28]
3 years ago
13

WILL MARK BRAINLIEST

Mathematics
2 answers:
antoniya [11.8K]3 years ago
7 0

Answer:

819.54 cm^2

Step-by-step explanation:

We are given

Slant height = l = 20cm

and

Diameter = d = 18 cm

We have to find radius first

r = d/2 = 18/2 = 9 cm

The formula for surface area is:

SA = \pi rl+\pi r^2\\= (3.14 * 9 * 20) + (3.14 * (9)^2)\\=565.5+254.34\\=819.84\ cm^2

As second option is nearest to calculated answer, it is the correct option ..

scoundrel [369]3 years ago
6 0

Answer: second option.

Step-by-step explanation:

We know that we can calculate the surface area of a cone with this formula:

SA=\pi rl + \pi r^2

Where "r" is the radius and "l" is the slant heigth.

We know that the radius is half the diameter, then the radius of this cone is:

r=\frac{18cm}{2}\\\\r=9cm

Since we know the radius and the slant height, we can substitute values into the formula, using 3.14 for π.

Therefore, we get:

 SA=(3.14)(9cm)(20cm) + (3.14)(9cm)^2=819.54cm^2

You might be interested in
Which expression is equivalent to (3-5i)-(-2+i)
N76 [4]

Answer:

-6i + 5

Step-by-step explanation:

(3-5i)-(-2+i) = 3 - 5i + 2- i = (-5i - i) + (3 + 2) = -6i + 5

3 0
3 years ago
Help please this is due today!!!<br><br> please provide a small explanation!!
AlekseyPX

Answer:

200 sq cm

Step-by-step explanation:

Lateral surface area is the surface area without the bases, or without the top and bottom. So, you just add up the area of the 4 sides.

The front and back are both 10 x 20, so 200 each = 400

The left and right are 5 x 20, so 100 each = 200

The lateral surface area is 200 sq. cm.

8 0
2 years ago
How do you find the average rate change from x = -1 to x = 3
Marrrta [24]

Well to begin, you'll need a graph but you have to do:

y2-y1

---------

x2-x1

(Which is the average rate of change formula.)

In order to find your "y" you look for your x on the graph the move either direction until you touch the graph. Hope this helps.. :)

8 0
3 years ago
For the polynomial p(x), p(– 8) = 0. Which of these must be a factor of p(x)?
wolverine [178]

Answer: x + 8 must be the factor of the given polynomial p(x).

Step-by-step explanation:

Here, p(x) is a polynomial in which p(-8) =0

By the reminder theorem,

When a polynomial, f(x), is divided by a linear polynomial , x - a, the remainder of that division will be equivalent to f(a).

That is when we divide p(x) by x+8 the reminder is p(-8)

⇒ when we divide p(x) by x+8 the reminder is 0.

Therefore, x+8 is a factor of p(x).



4 0
3 years ago
Consider that 620(1.082)x models the average annual health care costs per person, in dollars, as a function of the number of yea
max2010maxim [7]

Answer:

I guess that you want to calculate the difference between the annual healt care costs in 1950 and today.

The equation is:

C(x) = $620*(1.082)^x

in 1950, we have x = 0 (because is the initial year)

then the cost is:

C(0) = $620*1 = $620.

Now, today, in 2020, we have:

x = 2020 - 1950 = 70

then we have:

C(70) = $620*(1.082)^70 = $154,276.7

So, according to this equation, te difference is:

$154,276.7 -  $620 = $153,656.6

6 0
3 years ago
Other questions:
  • A garbage truck and a dump truck each drive along a straight road between two points. Using the points on a map that the city cr
    14·1 answer
  • mrs. lbare wrote three decimals on the bored follwed by the two blank spaces. Complete the sequence of numbers
    13·1 answer
  • Nate spent $28 on 2 dvds.at this rate how much would 5 dvds cost him
    14·1 answer
  • Law of sines: StartFraction sine (uppercase A) Over a EndFraction = StartFraction sine (uppercase B) Over b EndFraction = StartF
    5·2 answers
  • Solve 765/14 and write your answer in terms of a mixed number (please use this format: 75 3/5). *
    12·1 answer
  • PLEASE HELP!!! Find the equation , in the standard form of the line passing through the points (3,-4) and (5,1)
    12·1 answer
  • Pls I need help no links no fame awnsers
    15·2 answers
  • PLEASE HELP! I HAVE A TIME LIMIT AND IM BEHIND
    14·1 answer
  • The table shows linear relationship between the values of X and Y.
    12·1 answer
  • A survey was given to people who own a certain type of car. What percent of the people surveyed were completely satisfied with t
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!