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3 years ago

Plz helppp I need help on this

Mathematics

2 answers:

a_sh-v [17]3 years ago

4 0

Answer:

36π in^2

Step-by-step explanation:

The formula for calculating area of a circle is π×r^2

since the radius is given as 6

π × 6^2 = 36π in^2

maksim [4K]3 years ago

3 0

Answer:

The answer is 3rd point, 36π in²

Step-by-step explanation:

Given that thr formula of area of circle is A = π×radius². Then you can substitute the following values into the formula:

radius = 6 in

A = π × 6²

= 36π in²

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What is the volume of this rectangular pyramid?

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3 years ago

Explain why each function is continuous or discontinuous. (a) The temperature at a specific location as a function of time (b) T

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Answer:

(a) The temperature at a specific location as a function of time.

This is a continuous function as the temperature cannot increase in an instant like time.

(b) The temperature at a specific time as a function of the distance due west from New York City.

This is a continuous function as the temperature in one location is affected by its neighboring places.

The altitude above sea level can be discontinuous at a cliff, or continuous at very deep hole.

(d) The cost of a taxi ride as a function of the distance traveled.

This is a discontinuous function as the cost still raises if you make a stop.

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The electron traveling speed makes this discontinuous.

3 0

3 years ago

a map has a scale of 3.5 inches = 20 kilometers if the distance between two cities on the map is 4.9 inches what is the actual d

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28

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5 0

3 years ago

Read 2 more answers

Jay factored the 4 term polynomial : x^3 - 9x +2x^2 - 18 and decided that the complete factorization was : ( x + 2 ) (x^2-9 ). B

labwork [276]

Answer:

$x^3-9x+2x^2-18\left(x+2\right)\left(x+3\right)\left(x-3\right)$

Step-by-step explanation:

we are given that $x^3-9x+2x^2-18$

w are sked to step by step factorise the above polynomial

$\left(x^3+2x^2\right)+\left(-9x-18\right)$

$-9\mathrm{\:from\:}-9x-18\mathrm{:\quad }-9\left(x+2\right)$

$-9x-9\cdot \:2$

$-9\left(x+2\right)$

$\mathrm{Factor\:out\:}x^2\mathrm{\:from\:}x^3+2x^2\mathrm{:\quad }x^2\left(x+2\right)$

$-9\left(x+2\right)+x^2\left(x+2\right)$

$\left(x+2\right)\left(x^2-9\right)$

$x^2-9:\quad \left(x+3\right)\left(x-3\right)$

$x^2-9$

$\mathrm{Rewrite\:}9\mathrm{\:as\:}3^2$

$=x^2-3^2$

$\mathrm{Apply\:Difference\:of\:Two\:Squares\:Formula:\:}x^2-y^2=\left(x+y\right)\left(x-y\right)$

$x^2-3^2=\left(x+3\right)\left(x-3\right)$

Hence

$x^3-9x+2x^2-18=\left(x+2\right)\left(x+3\right)\left(x-3\right)$

a) The jay mistake was he did not factorise $x^3-9x+2x^2-18x^2-9 furtherb) the complete answer wil be [tex]x^3-9x+2x^2-18\left(x+2\right)\left(x+3\right)\left(x-3\right)$

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3 years ago

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A plane has 360 total seats, which are divided into economy class and business class. For every 13 seats in economy class, there

9966 [12]

Make an equation system based on the problem
An equation for "A plane has 360 total seats, which are divided into economy class and business class" is
∴ e + b = 360 (first equation)
"For every 13 seats in economy class, there are 5seats in business class" that means in 1b there is (5/13) e
∴ $b= \frac{5}{13} e$ (second equation)

Solve the equation, find the value of e
Subtitute b with (5e)/13 in the first equation
e + b = 360
$e + \frac{5e}{13} = 360$
Equalize the denominators
$\frac{13e}{13} + \frac{5e}{13} =360$
$\frac{18e}{13}=360$

move 13 to the right side, and solve for e
$\frac{18e}{13}=360$
18e = 360 × 13
18e = 4,680
e = 4,680/18
e = 260

Find the value of b
e + b = 360
260 + b = 360
b = 360 - 260
b = 100

There are 260 seats in economy class and 100 seats in business class

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3 years ago