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3 years ago

Does anyone know how to do this. No one will help.

Mathematics

2 answers:

givi [52]3 years ago

8 0

Answer:

150.7

Step-by-step explanation:

Formula for volume of a cone = $\pi r^2\frac{h}{3}$

where r = radius and h = height

We are given the diameter ( 8yds ) and the height ( 9yds )

In order to find the volume we need to find the radius

We can do this my dividing the diameter by 2 ( this is because the radius is equal to half the length of the diameter)

8/2 =4

So the radius is equal to 4yds

Now we plug in the values into the formula

( remember it says use 3.14 for π )

$V=(3.14)4^2\frac{9}{3} \\4^2=16\\16*3.14=50.24\\\frac{9}{3} =3\\3*50.24=150.72$

Finally we round to the nearest tenth and get that the answer is 150.7yd²

BARSIC [14]3 years ago

6 0

Answer:

150.8 $yd^3$

Step-by-step explanation:

I helped lol.

Have a nice day! :-)

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A railroad crossing sign has a diameter of 30 inches. what is the area of the sign?

Anna007 [38]

Answer:

706.5m^2

Step-by-step explanation:

The sign is a circle

Area of a circle is (pi)r^2

d = 30 in -> r = d/2 = 30/2 = 15

Area = 3.14 x (15)^2 = 706.5m^2

5 0

3 years ago

Read 2 more answers

PLEASE HELP ALMOST FINISHING ALBERA 1 PUT I NEED YOUR HELP PLEASE I BEG YOU BRAINLEST ANSWER!!!

tester [92]

59 is D
because with the point (-3,7) you substitute it into the equation, making it: 7=4x+b. solve for b. then you have y=4x+19. work out the algebra in the possible choices and whatever equals y=4x+19 will be the answer. in this case, its D.

60 is C
same as above, you do the algebra of the equation. bring the one over after doing distribution with the 4 and voila!

61 is A
a relatively easy one, all you do is the the slope -4 where m goes, and 3 where b goes. y= -4x+3

62 is C.
this one requires more work.
chose one of the points, in this case (2,7) and put them into the equation.
but wait, you need a slope!
you get that use the formula (y2-y1)/(x2-x1) which will be
(7-5)/(2-3) which will be
-2.
now you have y-7= -2(x-2)
voila!

63 is C. y= 1/2x+3

64 is B. (3, -5)

66 is B. negative. the line goes \ ( not / which is positive)

67 would be A. because it is positive and the I and the E are in the right places.

70 is C. 2/3. as before, remember we can but the points into this equation and have (6-4)/(3-0) which = 2/3

71 is D. y= 3x+10

72 is C. a third degree monomial

73 can't read

74 can't read

75 can't read.

4 0

3 years ago

Svetradugi [14.3K]

Answer:

The right answer is:

Option OB: f(1) = -9

Common difference: 7

Step-by-step explanation:

Given sequence is:

-9, -2, 5, 12,...

Here the first number is f(1)

Common Difference:

Common difference is the difference between consecutive terms of an arithmetic sequence. It is denoted by d.

In the given sequence,

f(1) = -9

f(2) = -2

f(3) = 5

$d=f(2)-f(1) = -2-(-9) = -2+9 = 7\\d = f(3)-f(2) = 5-(-2) = 5+2 = 7$

Hence,

The right answer is:

Option OB: f(1) = -9

Common difference: 7

7 0

3 years ago

Tickets to a local circus cost $5 for students and $8 for adults. A group of 9 people spent a total of $60. How many adults were

S_A_V [24]

Answer:

Step-by-step explanation:

You need to set up and solve a system of linear equations here.

Let s and a represent the number of students and adults respectively.

Then s + a = 9, and s = 9 - a.

Total ticket cost for the adults was ($8/adult)(a)

and for the students ($5/student)(s).

Total cost of the tickets was then ($8/adult)(a) + ($5/student)(s) = $60.

Then our system of linear equations is:

8a + 5s = 60

a + s = 9, or s = 9 - a. Substituting 9 - a for s, we get:

8a + 5(9 - a) = 60.

Then 8a + 45 - 5a = 60, or 3a = 15.

Solving for a, we get a = 5.

Solving for s using s = 9 - a, we get s = 9 - 5, or s = 4.

There were 5 adults in the group (and 4 students).

3 0

3 years ago

Jim's father bought a new car 3 years ago for

Alexus [3.1K]

30% of 50,400 = 30240.

Therefore the percentage loss is 30% over the course of 3 years.

4 0

3 years ago