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iren2701 [21]
3 years ago
14

CATNUMATICAL Reason Quantitatively Rachel, Timothy, and Robyn each make

Mathematics
1 answer:
valkas [14]3 years ago
5 0

Answer:

See explanation

Step-by-step explanation:

The question is incomplete, as the dimension of each prism is not given.

So, I will give a general explanation.

From the question, we understand each prism.

So, to get the new volume; we simply add up the volume of each prism.

For instance (we want to make assumptions)

Rachel

Length = 4; Width = 3; Height = 4

Timothy

Length = 6; Width = 3; Height = 4

Robyn

Length = 4; Width = 8; Height = 3

So, we have:

Volume = Length * Width * Height

For each, we have:

Rachel =4* 3* 4 =48

Timothy= 6* 3* 4 = 72

Robyn = 4* 8* 3 = 96

The volume of the new

Volume = 48 + 72 + 96

Volume = 216

The dimension of new prism.

Using the assumed values, we have:

Length = 4; Width = 3; Height = 4

Length = 6; Width = 3; Height = 4

Length = 4; Width = 8; Height = 3

Now, we consider the measure of the sides

Sides with the same length will form a new side.

<u>Side 1</u>

Length =4 --- Rachel

Height = 4 ---- Timothy

Length = 4 --- Robyn

The above lengths have the same measure. So, one of the sides of the new prism will assume the value of this length.

So:

Length = 4 -- for the new prism

<u>Side 2</u>

Width =3

Width = 3

Height = 3

The above lengths have the same measure. So, one of the sides of the new prism will assume the value of this length.

So:

Width = 3 -- for the new prism

<u>Side 2</u>

<u></u>Height = 4<u></u>

Length = 6

<u></u>Width =8<u></u>

<u></u>

<u>For this, we simply add up each length.</u>

<u>So, we have:</u>

<u></u>Height = 4 + 6 + 8<u></u>

Height = 18 --- for the new prism

So, the new dimension is:

Length = 4

Length = 6

Height = 18

Volume = 4 * 3 * 18

Volume = 216

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An object is launched from a launching pad 144 ft. above the ground at a velocity of 128ft/sec. what is the maximum height reach
ollegr [7]

Answer:

18) a. h(x) = -16x² + vx + h(0) ⇒ h(x) = -16x² + 128x + 144

b. The maximum height = 400 feet

c. Attached graph

19) The rocket will reach the maximum height after 4 seconds

20) The rocket hits the ground after 9 seconds

Step-by-step explanation:

* Lets study the rule of motion for an object with constant acceleration

# The distance S = ut ± 1/2 at², where u is the initial velocity, t is the time

  and a is the acceleration of gravity

# The vertical distances h in x second is h(x) - h(0), where h(0)

   is the initial height of the object above the ground

∵ h(x) = vx + 1/2 ax², where h is the vrtical distance, v is the initial

  velocity, a is the acceleration of gravity (32 feet/second²) and x

  is the time

18)a.

∵ The value of a = -32 ft/sec² ⇒ negative because the direction

   of the motion

  is upward

∴ h(x) - h(0) = vx - (1/2)(32)(x²) ⇒ (1/2)(32) = 16

∴ h(x) = vx - 16x² + h(0)

∴ h(x) = -16x² + vx + h(0) ⇒ proved

* Find the height of the object after x seconds from the ground

∵ h(0) = 144 and v = 128 ft/sec

∴ h(x) = -16x² + 128x + 144

b.

* At the maximum height h'(x) = 0

∵ h'(x) = -32x + 128

∴ -32x + 128 = 0 ⇒ subtract 128 from both sides

∴ -32x = -128 ⇒ ÷ -32

∴ x = 4 seconds

- The time for the maximum height = 4 seconds

- Substitute this value of x in the equation of h(x)

∴ The maximum height = -16(4)² + 128(4) + 144 = 400 feet

c. Attached graph

19)

- The object will reach the maximum height after 4 seconds

20)

- When the rocket hits the ground h(x) = 0

∵ h(x) = -16x² + 128x + 144

∴ 0 = -16x² + 128x + 144 ⇒ divide the two sides by -16

∴ x² - 8x - 9 = 0 ⇒ use the factorization to find the value of x

∵ x² - 8x - 9 = 0

∴ (x - 9)( x + 1) = 0

∴ x - 9 = 0 OR x + 1 = 0

∴ x = 9 OR x = -1

- We will rejected -1 because there is no -ve value for the time

* The time for the object to hit the ground is 9 seconds

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The total cost of owning a home for 6 years is $120,000. The
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After 6 years, the difference between owning the house and renting is $12,000.

<h3>What is the difference in owing and renting the house?</h3>

The first step is to determine the total cost of renting the house for six years.

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Difference = cost of owning - cost of renting

$120,000 - $108,000  = $12,000

To learn more about subtraction, please check: brainly.com/question/854115

#SPJ1

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