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
olchik [2.2K]
3 years ago
8

A student said that the surface area of the figure below was 57.4 square centimeters. Is the student correct? Explain.

Mathematics
1 answer:
FrozenT [24]3 years ago
3 0

Answer:

  no

Step-by-step explanation:

The surface area is the sum of the areas of the faces.

There are 4 faces that are 5 cm wide. Their respective heights (from front, over the top) are ...

  1 cm, 2.5 cm, 2 cm, 2.3 cm

for a total height of 7.8 cm. Thus, those 4 faces have a total area of ...

  (5 cm)(7.8 cm) = 39.0 cm^2

__

The two trapezoidal faces each have bases of length 1 and 2 cm, and a "height" of 2.3 cm. Together, their areas are ...

  A = 2×(1/2)(b1 +b2)h = (b1 +b2)h

  A = (1 cm +2 cm)(2.3 cm) = 6.9 cm^2

__

The surface area of the entire trapezoidal prism is then ...

  total area = base area + lateral area = 6.9 cm^2 +39 cm^2

  total area = 45.9 cm^2

The student's answer of 57.4 cm^2 is not correct. (We don't know where that calculation came from.)

You might be interested in
Lucy will rent a car for the weekend. She can choose one of two plans. The first plan has an initial fee of $53 and costs an add
Alchen [17]

Answer:

The amount driven would be 275, and the cost for both plans will be 77.75$

Step-by-step explanation:

make both equations

y=0.09x+53

y=0.13x+42

set them equal to each other and solve for x to get the distance

take that number and put it in one equation and solve for y to get the price of the plan for that value

6 0
2 years ago
Express this sum using summation notation 1+1/2+1/3+1/4+1/5+1/6
vesna_86 [32]

Answer:

21

Step-by-step explanation:

the sum of the express of the summation of the notation

4 0
3 years ago
Read 2 more answers
Z/2 + 3 = -80<br><br> The solution is z=
nirvana33 [79]

Answer:

z = -166

Step-by-step explanation:

1. Subtract 3 from both sides to get z/2 = -83

2. Multiply 2 by both sides to get z = -166

z = -166

8 0
3 years ago
Read 2 more answers
Can you please help me? Thanks!!!!
ss7ja [257]
The answer is 25 degrees.

This is how you solve the equation, first you must know that the straight like ABC=180, DBC is 130, so the remaining amount is 50 degrees, BE is a bisector of ABD which means it splits ABD right down the middle. So ABE+EBD=50 degrees, 25+25=50 since both sides MUST be equal in order for BE to be a bisector of ABD.

If you have any more questions feel free to ask them here on Brainly.com, please make sure to give my answer a rate, like, and vote brainliest if I've helped you out, it helps me a lot too!
4 0
3 years ago
7a+5=61 what is a in the equation
MrRa [10]

Answer:

a=8

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Other questions:
  • What is the slope of a line that goes through (0,0) amd (5,-1)
    13·2 answers
  • How do you write an equation to represent a real-world situation?
    11·1 answer
  • -8x=-24 need help please
    15·2 answers
  • If i was born april 16th 1991 how old would i be?
    7·2 answers
  • Jason thinks he needs 25 boxs to pack 144 cups is Jason correct explain
    15·2 answers
  • Plzz help me quick look at both pics and tell me the correct answer
    11·2 answers
  • Let y=f(x) be the particular solution to the differential equation dy/dx=2x−1/y^2 with the initial condition y(0)=3. Which of th
    12·1 answer
  • Find the slope and Y-intercept, then graph<br> X - 3y = 9
    10·1 answer
  • If F(x) = 5x - 7 and G(X) = x2 - 41, what is G(F(x))?
    7·1 answer
  • Use the information given to answer the question.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!