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
pychu [463]
3 years ago
13

Plz do not delete my questions. I will give you 30 points for these three questions. A thanks. And a 5 star rate. But in order f

or this to happen you have to make sure to SHOW YOUR WORK and MAKE SURE IT IS RIGHT. Then I will give you all of that.
1. Vikram is studying the square pyramid below.

The first and second pictures are for this question.

To find the surface area of the pyramid, in square inches, Vikram wrote SECOND PICTURE HERE. What error did Vikram make?
He used the same expression for the area of all four lateral faces.
He used the wrong expression to represent the area of the base of the pyramid.
He used the wrong value as the height when he found the area of the lateral faces.
He used an expression for surface area that only finds the total area of three faces.

2. Tracy used the expression THIRD PICTURE GOES HERE to find the surface area, in square centimeters, of the rectangular pyramid below.

This is for the fourth picture.

Which statement best describes her work?

Tracy’s answer will be incorrect because she forgot the factor 1/2 in the expression representing the area of the triangular faces.
Tracy’s answer will be incorrect because the pyramid has five faces and her expression finds the sum of only three products.
Tracy’s answer will be correct because she made use of the fact that 2 (1/2) = 1 in her expression.
Tracy’s answer will be correct because a rectangular pyramid has only three faces and the expression finds the sum of three products.

3. What is the total surface area of this rectangular pyramid?

This is for the last picture
______ square meters

Mathematics
2 answers:
poizon [28]3 years ago
3 0
(1) <span>The surface area of the square pyramid = 4 * (area of one face) + area of the base
area of one face = 0.5 * 34.2 * 28.4
area of the base = 34.2 * 34.2
∴ </span>The surface area of the pyramid = 4 * (<span>0.5 * 34.2 * 28.4) + </span><span>34.2 * 34.2

By comparing the last answer with the answer of </span>Vikram, we find that:
He used the wrong expression to represent the area of the base of the pyramid.
=========================================================

(2) The surface area of the rectangular pyramid
= area of two face with the height 36.5 + area of two face with the height 37.8 + area of the base

area of two face with the height 36.5 = 2 * 0.5 * 36.5 * 25.6
area of two face with the height 37.8 = 2 * 0.5 * 37.8 * 16.2
are of the base = 25.6 * 16.2

Total area = (2 * 0.5 * 36.5 * 25.6) + (2 * 0.5 * 37.8 * 16.2) + (25.6 * 16.2)
                = (36.5 * 25.6) + (37.8 * 16.2) + (25.6 * 16.2)
note: 2 *0.5 = 1

By comparing the last answer with the answer of Tracy , we find that:
<span>Tracy’s answer will be correct because she made use of the fact that 2 (1/2) = 1 in her expression.
=========================================================
</span>
(3)
the total surface area of this rectangular pyramid =
= area of two face with the height 52 + area of two face with the height 60 + area of the base

area of two face with the height 52 = 2 * 0.5 * 52 * 78 = 4,056  m²
area of two face with the height 60 = 2 * 0.5 * 60 * 50 = 3,000  m²
are of the base = 78 * 50 = 3900  m²

Total area = 4,056 + 3,000 + 3,900 = 10,956 m²



















densk [106]3 years ago
3 0

Answer:

give the other guy brainliest

Step-by-step explanation:

You might be interested in
Y=4x^3+3x^2-2x+9.<br>=&gt; y'=?​
-Dominant- [34]

Step-by-step explanation:

y'=dy/dx=d/dx(4x³+3x²-2x+9)

=(3*4x^(3-1)+2*3x^(2-1)-2*1x^(1-1)+9*0

y'=12x²+6x-2

4 0
2 years ago
A family has a huge array of solar panels to make electricity. If each month they sell back 420 kWh for $0.07 per kWh, how much
lana66690 [7]

Answer:

$352.80

Step-by-step explanation:

We have been given a family sell back 420 kWh for $0.07 per kWh each month.

First of all, we will find monthly income of family from solar panels by multiplying 420 by $0.07.

\text{Monthly income of family from solar panels}=420\text{ kWh}\times \frac{\$0.07}{\text{kWh}}

\text{Monthly income of family from solar panels}=420\times\$0.07

\text{Monthly income of family from solar panels}=\$29.40

To find the money earned by the family is one year, we will multiply monthly income by 12 as 1 year equals to 12 months.

\text{Annual income of family from solar panels}=\$29.40\times 12

\text{Annual income of family from solar panels}=\$352.80

Therefore, the family could make $352.80 in a year from solar panels.

3 0
3 years ago
the area of a rectangle is 60. the length and width are vary inversely. write the equation and find the length when the width is
Wittaler [7]

Answer:IDKKKKKKKKKKKKK

Step-by-step explanation:

4 0
3 years ago
Write a simplified expression for the length of AC.
Elena L [17]

Answer:

see below

Step-by-step explanation:

Using the segment addition postulate

AB + BC = AC

x+2 + 7x-3 = AC

Combine like terms

8x -1 = AC

Using the segment addition postulate

PQ + QR = PR

8y+5 + QR = 13y+25

Subtract 8y from each side

5 + QR = 13y-8y+25

5 + QR = 5y+25

Subtract 5 from each side

QR = 5y+25-5

QR = 5y+20

3 0
3 years ago
12.56 rounded to the nearest tenth
lapo4ka [179]
12.6
Since the place just to the right of the decimal is the tenth, we look at the digit to the right of it & if it is 5 or higher, we'll round up. If it's 4 or less, we'll leave it as is (taking out the hundredth place, or the digit to the right). Hope this helps!
6 0
3 years ago
Read 2 more answers
Other questions:
  • Write the equation of the line passing through point (4, -1) and perpendicular to the line whose equation is 2 x - y - 7 = 0.
    10·1 answer
  • Given 9, 12, 15, 18, 21, 24 ... Write an algebraic representation for this sequence.
    7·2 answers
  • Justin is training for a hamburger eating competition. He is eventually able to eat 15 hamburgers in 10 minutes. What is justin’
    11·1 answer
  • Evaluate 15 divide by k when k = 3
    10·2 answers
  • Question 6
    15·1 answer
  • Can some one help me with total surface area of rectangular prism plz
    6·1 answer
  • Which of the following points does not lie on the line whose equation is x+ y = 7?
    13·1 answer
  • What’s the solution to this problem-5/2=3/4+n
    5·1 answer
  • 408 = 12x + 16y solve for both x and y?
    10·1 answer
  • Please help. I will mark BRAINLIEST!
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!