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
Free_Kalibri [48]
3 years ago
10

Plz do not delete my questions. I will give you 20 points for these two questions. A thanks. And a 5 star rate. But in order for

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

First picture is for this question.

_______ square feet

2. What is the surface area of the square pyramid below?

Second picture is for this question

96 cm2
122 cm2
132 cm2
144 cm2

Mathematics
2 answers:
Amanda [17]3 years ago
8 0
For question 2, the answer is 120 cm^2

The formula is SA = b + 1/2 ps
p = perimeter
s = slant height

this is a square, so all the sides are equal. So 6 cm x 4 = 24 cm, this is the perimeter of the base.
then multiply this by the slant height, and you get 192.
192 x 1/2 = 96.
96 + 24 (the area of the base) = 120.

120 = 24 + (1/2 x 24 x 8)
nirvana33 [79]3 years ago
3 0

Answer:

Step-by-step explanation:

The total surface area of rectangular pyramid is calculate as;

A = 2x(area of triangle with height 8ft and base 12ft) +2x(area of triangle with height 6ft and base 9.5ft)+ area of rectangle

A = 2\times(\frac{1}{2}\times(12)\times(8))+2\times(\frac{1}{2}\times(9.5)\times(6)) + (12\times6)

A = 2\times(\frac{1}{2}\times96)+2\times(\frac{1}{2}\times57) + (72)

A = 2\times(48)+2\times(\frac{1}{2}\times57) + (72)

A = 96+2\times(\frac{1}{2}\times57) + (72)

A = 96+57+72

A = 225

Hence, the total surface area of the rectangular pyramid is 225<u> cm²</u>

The area of square pyramid is calculated as: \text{A} = 2(b\times l)+b^{2}

in second figure we can see base 'b' is 6 and lateral height 'l' is 8.

so,

\text{A} = 2(b\times l)+b^{2}

Put b = 6 and l = 8 in above formula,

 = 2(6\times8) + 6^{2}

 = 2\times48 + 36

 = 96 + 36

  = 132

Hence, the surface area of the square pyramid is <u>132 cm²</u>

You might be interested in
Anyone want brainliest
vaieri [72.5K]
Me please and thank you
7 0
3 years ago
Read 2 more answers
A water trough is 7 feet long, and its cross section is an equilateral triangle with sides 4 feet long. Water is pumped into the
Tju [1.3M]

Answer:

a. An equilateral triangle main characteristic is that all the sides lenght are the same (s). To find the height (h), we could divide the triangle (as seen in the picture) and apply Pytagorean theorem.

(\frac{s}{2}) ^{2} +h^{2}=s^{2}

Clearing the expression, we obtain: h= \frac{\sqrt{3}}{2}s

b. Knowing the rate at which the volume is changing 4 ft^{3}, we can find the relation between the change in the volume and the height.

V=A*h

As we want to express the volume in terms of the height, we have to find the area in terms of height

A=\frac{base*height}{2}

Base=s=\frac{2h}{\sqrt{3}}

Therefore, A=\frac{\frac{2h}{\sqrt{3}} *h}{2} =\frac{h^{2} }{\sqrt{3}}

V=7 ft*\frac{h^{2}}{\sqrt{3}}

Therefore the change in the volume with the height, will be the derivate of this expression

\frac{dV}{dt} =2*7*\frac{h}{\sqrt{3}} (\frac{dh}{dt}  )

Knowing dV/dt=4 cubic feet per second, and h=1/2 foot, we can know dh/dt

\frac{dh}{dt}=\frac{\frac{dV}{dt}*\sqrt{3}}{7*2*h} =\frac{4*\sqrt{3} }{14*\frac{1}{2} }=0.98 ft/sec

Step-by-step explanation:

7 0
4 years ago
What is the value of m in the quotient of powers
BigorU [14]

\bf ~\hspace{7em}\textit{negative exponents} \\\\ a^{-n} \implies \cfrac{1}{a^n} ~\hspace{4.5em} a^n\implies \cfrac{1}{a^{-n}} ~\hspace{4.5em} \cfrac{a^n}{a^m}\implies a^na^{-m}\implies a^{n-m} \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ \cfrac{9^{-3}}{9^2}=\cfrac{1}{9^m}\implies 9^{-3}\cdot 9^{-2}=1\cdot 9^{-m}\implies 9^{-3-2}=9^{-m}\implies 9^{-5}=9^{-m} \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ ~\hfill 5=m~\hfill

6 0
3 years ago
The length of a rectangle is 2 m greater than the width. The area is 143m^2. Find the length and the width.
iogann1982 [59]

Answer:

L = 13  m     W = 11   m

Step-by-step explanation:

L = W + 2  

area =  L   x   W

143   = (W+2)   *  W

143 =  W^2 + 2w

W^2 + 2W - 143 = 0  

Use Quadratic Formula    (a = 1   b = 2   c = - 143)

   to find   W = 11 m      then   L = 13

8 0
2 years ago
1 plus 1 is equal to 2 but jonas has 19 more
Vlada [557]

Answer:

Jonas has 21.

Step-by-step explanation:

19+2= 21

Since he has 19 more than what the other person has, which is 2.

4 0
3 years ago
Other questions:
  • Find the mean, median, mode for the data set below.<br> 32, 20, 45, 20, 14, 7, 20
    7·2 answers
  • Need help with question
    12·2 answers
  • Please help with this Geometry worksheet.
    11·1 answer
  • In a class of 6, there are 4 students who are secretly robots. If the teacher chooses 2 students, what is the probability that n
    13·1 answer
  • Mark simplified three over five ÷ five over eight.; his work is shown below. Identify where he made his error.
    14·2 answers
  • Find the vertices and foci of the hyperbola with equation (x-3)^2/16-(y+4)^2/9 = 1
    7·1 answer
  • I. Collect data from several fast food chains on the number of fat calories and grams of saturated fat in menu items. Record at
    13·1 answer
  • A normal curve with a mean of 500 and a standard deviation of 100 is shown. Shade the region under the curve within one standard
    5·1 answer
  • This is due today and it would be awesome if someone could do one of these problems so I can see how to do them thanks :)
    10·2 answers
  • What is the OUTPUT for this equation if the INPUT is 20?<br><br> y = 2x
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!