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
OLEGan [10]
3 years ago
12

What is the surface area of a triangular pyramid if each face has an area of 80 m2? A. 240 m2 B. 160 m2 C. 320 m2 D. 20 m2

Mathematics
1 answer:
alexdok [17]3 years ago
5 0
If each face is 80m² and there are 4 identical faces, the answer would be 4 x 80 = 320m² - C
You might be interested in
6 more than the difference of b and 5
kirza4 [7]
The answer would be b-5+6
8 0
3 years ago
Use the figure to answer the following questions.
Mars2501 [29]
A) AB is where plane P and plane R intersect.
B) A, D, B are collinear (on the same line).
C) plane ADG (three points on the plane)
D) F, D, G, A are all on plane R
E) D lies on both planes.
7 0
3 years ago
What is m∠2 + m∠3?<br> HELPPPPP!!!!!
Eva8 [605]
I believe the answer is 90
5 0
3 years ago
Read 2 more answers
3. A balancing balloon toy is in the shape of a hemisphere (half-sphere) attached to the base of a cone. If the toy is 4ft tall
Katen [24]

Answer:

The volume of the toy is V=5.23\ ft^3

Step-by-step explanation:

step 1

Find the volume of the hemisphere

The volume of the hemisphere is given by the formula

V=\frac{2}{3}\pi r^{3}

In this problem, the wide of the toy is equal to the diameter of the hemisphere

so

D=2\ ft

r=2/2=1\ ft ----> the radius is half the diameter

substitute

V=\frac{2}{3} \pi (1)^{3}=\frac{2}{3} \pi\ ft^3

step 2

Find the volume of the cone

The volume of the cone is given by

V=\frac{1}{3}\pi r^{2}h

we know that

The radius of the cone is the same that the radius of the hemisphere

so

r=1\ ft

The height of the cone is equal to subtract the radius of the hemisphere from the height of the toy

h=4-1=3\ ft

substitute the given values

V=\frac{1}{3}\pi (1)^{2}(3)=\pi\ ft^3

step 3

Find the volume of the toy

we know that

The volume of the toy, is equal to the volume of the cone plus the volume of the hemisphere.

so

V=(\frac{2}{3} \pi+\pi)\ ft^3

V=(\frac{5}{3}\pi)\ ft^3

assume

\pi=3.14

V=\frac{5}{3}(3.14)=5.23\ ft^3

5 0
3 years ago
Waiting Line Models:Movies tonight is a typical video and dvd movie rental outlet for home-viewing customers. During the weeknig
pentagon [3]

Answer:

  1. Probability [No customers in system] = 0.375
  2. Customers waiting for service = 25/24
  3. Average time customer wait = 1.25/1.5
  4. May be wait
  5. Per customer average time = 1.33 (Approx)

Step-by-step explanation:

Given:

Arrival rate λ = 1.25 min

Mean μ = 2

Computation:

(a) Probability [No customers in system]

Probability [No customers in system] = 1-[λ/μ]

Probability [No customers in system] = 1-[1.25/2]

Probability [No customers in system] = 0.375

(b) Customers waiting for service

Customers waiting for service = λ²/ [μ(μ-λ)]

Customers waiting for service = 1.25²/ [2(2-1.25)]

Customers waiting for service = 25/24

(c) Average time customer wait

Average time customer wait = λ / [μ(μ-λ)]

Average time customer wait = 1.25/ [2(2-1.25)]

Average time customer wait = 1.25/1.5

(d) May be wait because Customers waiting for service = 25/24

(e) Per customer average time

Per customer average time = 1/(μ-λ)

Per customer average time = 1/(2-1.25)

Per customer average time = 1.33 (Approx)

7 0
2 years ago
Other questions:
  • 9.43 2.3x-6.7x=-0.3x
    14·1 answer
  • Are 18:3 and 6:1 equivalent radios?
    7·2 answers
  • A. What is an equation of the line with slope -1/2 and y-intercept 2??
    5·1 answer
  • Functions f(x) and g(x) are shown below:
    5·1 answer
  • What is the slope of a line parallel to the line whose equation is 4x – 2y = 7?
    8·2 answers
  • What is the least common multiple of 25, 10 and 30?
    13·2 answers
  • A parallelogram has an area of 48 square meters. What could its base and height be?
    8·2 answers
  • Judy has 2 3/4 bags of rock that she wants to use in her yard. Each bad will cover 310.2 sq ft. How many square feet will Judy b
    7·1 answer
  • Petra made the following observation:
    13·1 answer
  • Is it ok if somone answers this for me :)...?<br><br> (−12)(−5)
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!