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3 years ago

Which of the following solid objects has exactly one circular base?

2 answers:

6 0

A cone. A cylinder has two. A pyramid doesn't have a circular base. A sphere is completely round, so it doesn't have a base. That is why the correct answer is "D".

I hope this helped!

Alexxandr [17]3 years ago

3 0

Answer:

the right answer is cylinder

Step-by-step explanation:

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Really need help with this problem

True [87]

Answer:

tanC = 3/4

Step-by-step explanation:

by Pythagoras theorem first find the line DE =

$36^{2}$ + $DE^{2}$ = $45^{2}$

-> DE=27

then we know that tanθ=opposite/adjacent

so, 27/36 =tanC

simplified: tanC = 3/4

4 0

2 years ago

Please help me answer this question

ratelena [41]

By the definition of the hyperbolic function tanh x, we have proven that $\frac{1-tanh \ x}{1 + tanh \ x}=e^{-2x}$

<h3>Hyperbolic functions & Proof of identities </h3>

By definition

$tanh \ x=\frac{e^{x} -e^{-x}}{e^{x} +e^{-x}}$

Then,

$\frac{1-tanh \ x}{1 + tanh \ x}=\frac{1-\frac{e^{x} -e^{-x}}{e^{x} +e^{-x}} }{1+ \frac{e^{x} -e^{-x}}{e^{x} +e^{-x}} }$

$=1-\frac{e^{x} -e^{-x}}{e^{x} +e^{-x}} \div (1+ \frac{e^{x} -e^{-x}}{e^{x} +e^{-x}} })$

$=\frac{e^{x} +e^{-x}-(e^{x} -e^{-x})}{e^{x} +e^{-x}} \div (\frac{e^{x} +e^{-x}+e^{x} -e^{-x}}{e^{x} +e^{-x}} })$

$=\frac{e^{x} +e^{-x}-e^{x} +e^{-x}}{e^{x} +e^{-x}} \div \frac{e^{x} +e^{-x}+e^{x} -e^{-x}}{e^{x} +e^{-x}} }$

$=\frac{e^{-x}+e^{-x}}{e^{x} +e^{-x}} \div \frac{e^{x} +e^{x} }{e^{x} +e^{-x}} }$

$=\frac{2e^{-x}}{e^{x} +e^{-x}} \div \frac{2e^{x} }{e^{x} +e^{-x}} }$

$=\frac{2e^{-x}}{e^{x} +e^{-x}} \times \frac{e^{x} +e^{-x}}{2e^{x}}$

$=\frac{2e^{-x}}{1} \times \frac{1}{2e^{x}}$

$=\frac{2e^{-x}}{2e^{x}}$

$=\frac{e^{-x}}{e^{x}}$
$=e^{-x} \times \frac{1}{e^{x}}$

$= e^{-x} \times e^{-x}$

$= e^{-x+-x}$

$= e^{-x-x}$

$= e^{-2x}$

Hence, we have proven that $\frac{1-tanh \ x}{1 + tanh \ x}=e^{-2x}$

Learn more on Proof of Identities here: brainly.com/question/2561079

#SPJ1

6 0

2 years ago

A right rectangular prism has a height of 15 meters, a length of 4 meters, and a width of 3 meters. Which expressions

Fofino [41]

Answer:

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

Can someone please help, answer with steps.

julsineya [31]

Your Answer Is C) III Only.

A temperature increase of 5/9 degrees Fahrenheit is equivalent to a temperature increase of 1 degree Celsius.

One way we could check is by multiplying (f -32) by five degrees.

( f - 32 ) = 31

9 / 5 = 1.8

31 * 1.8 = 55.8

55.8 / 14^2 = 0.28

Now, let's check,

0.28 / 1.8 = 0.504

0.504 * 28.1232 = 55.8

Or it could be solved by keeping on adding. (That would be easier but I prefer multiplying.)

- Please Mark Brainliest, This Took me a while. :v

8 0

2 years ago

In a certain Algebra 2 class of 21 students, 12 of them play basketball and 14 of them play baseball. There are 5 students who p

gizmo_the_mogwai [7]

Answer:26/21

Step-by-step explanation:

Total number of students=21

Number of students that plays basket ball=12

Number of students that plays

baseball=14

Number of students that play neither of the games=5

Probability that a student chosen at random plays basket ball or baseball

=12/21+14/21

26/21

8 0

3 years ago

Read 2 more answers