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
The distribution of IQ scores can be modeled by a normal distribution with mean 100 and standard deviation 15.
evablogger [386]

Answer:

4.4% of the population with IQ between 120 and 125.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 100

Standard Deviation, σ = 15

We are given that the distribution of IQ scores is a bell shaped distribution that is a normal distribution.

a) Let X be a person's IQ score.

Then, density functions for IQ scores is given by:

P(x) = \displaystyle\frac{1}{2\sqrt{2\pi}}e^{-\frac{z^2}{2}}\\\\\text{where,}\\\\z = \frac{x-\mu}{\sigma}\\\\P(x) = \displaystyle\frac{1}{2\sqrt{2\pi}}e^{-\frac{(x-\mu)^2}{2\sigma^2}}\\\\P(x) = \displaystyle\frac{1}{2\sqrt{2\pi}}e^{-\frac{(x-100)^2}{450}}

b) P(population with IQ between 120 and 125.)

Formula:

z_{score} = \displaystyle\frac{x-\mu}{\sigma}

P(120 \leq x \leq 125) = P(\displaystyle\frac{120 - 100}{15} \leq z \leq \displaystyle\frac{125-100}{15}) = P(1.33 \leq z \leq 1.66)\\\\= P(z \leq 1.66) - P(z < 1.33)\\= 0.952 - 0.908 = 0.044 = 4.4\%

P(120 \leq x \leq 125) = 4.4\%

6 0
3 years ago
Which measurement could be a volume measure? A; 25 kg B; 36 m 2 C; 44 mm D; 75 in 3 help please ..
DanielleElmas [232]

Answer:

d

Step-by-step explanation:

Volume can be described as the total amount of space that is in a closed surface. this amount of space is usually three dimensional. Volume is usually measured in m³ or cm³ or in³

For example,  the volume of a rectangular box given the following dimension : length - 3cm

breadth - 8cm

height - 10 cm

volume = length x width x height = 8 x 3 x 10 = 240 cm³

6 0
3 years ago
Which expression can be used to find 32% of 130?
Gemiola [76]

Answer:

b. 0.32 • 130

Step-by-step explanation:

Change the percent to decimal form

32% = .32

.32 * 130

6 0
3 years ago
Two numbers with a product of 1, such as 3/4 and 4/3 are called reciprocals
evablogger [386]

Answer:

thanks for the points i mean really. anways hope someone else can help

8 0
2 years ago
**PLEASE ANSWER TO HELP ME UNDERSTAND**
Anuta_ua [19.1K]

Answer:

1)  -120, -240, -360

2) 24 oz

Step-by-step explanation:

1) 24 * 5 = 120 , 24 * 10 = 240, 24 * 15 =360

5 years will be -120, 10 years will be -240, 15 years will be -360

2) 8 * 3 = 24 oz

I hope this helped, please mark Brainliest, thank you!!

5 0
3 years ago
Other questions:
  • If i have 66$ and i bought 44 stones, how much did the stones cost?
    12·1 answer
  • Solve the proportion <br> 7/5=10.5/b
    14·1 answer
  • Ryan bought a digital camera with a list price of $150 from an online store offering a 5% discount. He needs to pay $5.50 for sh
    12·2 answers
  • The volume of Jupiter is approximately 10^14 cubic kilometers. The volume of Earth is approximately 10^11 cubic kilometers. How
    10·1 answer
  • NEED HELP!!! URGENT.................
    8·2 answers
  • Please help with this asap ty ​
    11·1 answer
  • What's bigger 8/15 or 11/20 (fractions)
    14·1 answer
  • Simplifique la expresión hallando<br>(o, 5 + .6 - 0,05 ) x 10<br>3. 1 - 2,06​
    12·1 answer
  • To make 20 pancakes you have to use 3 eggs. how many eggs do you use to make 100 pancakes?
    14·1 answer
  • Cassandra needs 5 1/2 yards of fabric to make her dress. she has 3 5/6 yards already. how much more does she need? Plz give expl
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!