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4 years ago

What is 0.45 x 3.2=??

Mathematics

2 answers:

Elina [12.6K]4 years ago

6 0

The answer should be 1.44 or 1.4 if you have to round.

miskamm [114]4 years ago

4 0

It equals 1.44...........

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A particle moves along the x-axis so that at time t ≥ 0 its position is given by x(t) = 2t3 - 21t2 + 72t - 53. At what time t is

Zepler [3.9K]

Step-by-step explanation:

The particle is at rest when the derivative of x(t), which is its velocity, is zero, i.e.,

$\dfrac{d}{dt}[x(t)] = \dot{x}(t) = 0$

Since $x(t) = 2t^3 - 21t^2 + 72t - 53,$ its derivative is

$\dot{x}(t) = 6t^2 - 42t + 72$

Equating this to zero, we get

$6t^2 - 42t + 72 = 0 \Rightarrow t^2 - 7t + 12 = 0$

This is a familiar quadratic equation whose roots are

$t = \dfrac{-b \pm \sqrt{b^2 - 4ac}}{2a}$

$\;\;\;= \dfrac{7 \pm \sqrt{(7)^2 - 4(1)(12)}}{2}$

$\;\;\;= \dfrac{7 \pm 1}{2}$

$\;\;\;= 3\;\text{and}\;4$

This means that the particle will be at rest at t = 3 and t= 4.

8 0

3 years ago

Given: AD = BC and AD || BC

o-na [289]

Answer:

See below

Step-by-step explanation:

Proof:

Statements | Reasons

AD ≅ BC | Given

AD ║ BC | Given

AC ≅ AC | Reflexive Property

∠DAC ≅ ∠ACB | If 2 || lines are cut by a trans., the | alternate interior ∠s are congruent.

ΔADC ≅ ΔBCA | S.A.S Postulate

BA ≅ DC | Corresponding sides of congruent Δs

So, quad. ABCD is a ║gm | If a quad. has its opposite sides

| congruent, the quad. is a parallelogram.

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3 years ago

a company has 95,000 shares of stock to sell. A stock broker decides to buy 150 shares of the stock for each of her 250 clients.

Ivahew [28]

There would be 57,500 shares left to sell

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3 years ago

Read 2 more answers

D.153.86in.............

Novay_Z [31]

It is D) 153.86 just find it by using the formula

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3 years ago

What is the value of x?

Lerok [7]

The value of x is about 4.7

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3 years ago