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
mojhsa [17]
3 years ago
12

WORTH 99 POINTS!

Mathematics
2 answers:
Ksivusya [100]3 years ago
8 0
The general formula for the lateral surface area of a regular pyramid is:
A= \frac{1}{2} *p*l
Where:
p=perimeter of a base
l=slant height

a.
a=3ft
l=4ft
p=5*a=5*3=15ft
A= \frac{1}{2} *15*4=30 ft^{2}

b.
a=2.5ft
l=4ft
p=6*a=6*2.5=15ft
A= \frac{1}{2} *15*4=30 ft^{2}

c.
a=1.9ft
l=4ft
p=8*a=8*1.9=15.2ft
A= \frac{1}{2} *15.2*4=30.4 ft^{2}

d.
Based on a lateral surface area the blue umbrella is best choice. But, the best umbrella overall is the one with the greatest base area. General formula for regular polygon is:
A= \frac{1}{4} *n* a^{2}*cot( \frac{180}{n} )

For pentagon:
A=15.48ft^2
For hexagon:
A=16.24ft^2
For octagon:
A=17.43ft^2
Blue umbrella is still best choice.
Katarina [22]3 years ago
8 0

Hello!

A) 30ft^2

B) 30ft^2

C) 30.4ft^2

D) I don't know this sorry :/

I hope it helps!

You might be interested in
3. MATCH is a regular pentagon with coordinates M(-1,1) and A(3,0). What is the perimeter of MATCH?
Makovka662 [10]

Answer:

<h3>2.squareroot 85</h3>

Step-by-step explanation:

<h2>#carry on learning</h2><h2>#mark branlits</h2>
6 0
2 years ago
PLEASE HELP FOR 87 POINTS!!!!!!!!!!!!!!!!!!!!!!!!!!
Anton [14]
1. You can expand the coefficients to yield 6, and add the powers since the bases are the same (ie A)

2. y⁻² can also be rewritten as 1/y², so it becomes 1/y² · 1/y⁵ = 1/y⁷ (ie C)

3. Only the x is affected by the power.

4. y = 3·5ˣ doesn't change in slope, so it essentially is similar to a 5ˣ graph.

5. Should be pretty straight forward.
6. Should be pretty straight forward.
7. Should be pretty straight forward.

8. Since x is the length of the border, calculate the area of the frame and subtract that from the area of the square painting. (Remember that the length of the square painting is x - 8, not x - 4)

9. Should be pretty straight forward.
11 - 25 are pretty much similar to each other.
If you have trouble, let me know and I'll walk you through it.
6 0
3 years ago
Read 2 more answers
Please HELP me !!!! <br> No LINKS!!!!!
11111nata11111 [884]

Answer:

I think its A

Step-by-step explanation:

The graph shows its number are getting greater than -4 and i think solid dots mean greater than or equal to the number

8 0
2 years ago
The table below represents the atmospheric temperature at a location as a function of the altitude:
RSB [31]

from x15 to x 25 is 4 - -16 = -20 degree change

25 -15 = 10000 feet

-20/10 = -2 degrees every 1000 feet


7 0
3 years ago
PLEASE HELPP ILL MARK BRAINLIEST<br> 50 POINTS!! PLEASE
Nutka1998 [239]

Answer:

Step-by-step explanation:

12) Decrease in miles = 22,250 - 14,500 = 7750 miles

Percent \ decrease = \dfrac{7750}{22250}*100

                             = 34.83%

13) Decrease in speed = 40 - 25 = 15 mph

Percent \ decrease = \dfrac{15}{40}*100

                            = 37.5%

6 0
3 years ago
Other questions:
  • Jeri finds a pile of money with at least $\$200$. If she puts $\$50$ of the pile in her left pocket, gives away $\frac23$ of the
    12·1 answer
  • What is 21,321 rounded to the nearest 100
    8·2 answers
  • jack has 100 football cards that he wants to put in a photo album. Each page in the album will hold eight cards. How many pages
    15·1 answer
  • Paul had 45 flyers to post around town. Last week, he posted 2/3 of them. This week, he posted 1/5 of the remaining fliers. How
    9·2 answers
  • “Mark your diagram with the givens and write a 2 column proof” IMAGE ATTACHED PLEASE HELP!!
    8·1 answer
  • Quadrilateral RUST has a vertex at R(2, 4).
    10·1 answer
  • Find the value of x 2x = 98² - 2²​
    9·2 answers
  • A family makes rods by cutting plastic pipes that are 5 feet long into 8 rods, how long are each rod?
    12·1 answer
  • Which rational number equals 0 point 6 with bar over 6? (5 points)
    14·2 answers
  • What is the euclidean distance between x(3,2,5) and y(2,3,3) in three dimensional space?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!