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3 years ago

Can someone answer this?

Mathematics

1 answer:

Tcecarenko [31]3 years ago

6 0

340.8 cm^2.

72+72+72+62.4+62.4=340.8cm^2.

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List at least four investment alternatives.

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3 years ago

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Hal forgot the number of people at the basketball game.He does remember that the number had four digits and a 3 in the tens plac

Greeley [361]

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K=5/9(F+459.67) solve for F in terms of K

Mila [183]

Answer:

F = 5.67503704

Step-by-step explanation:

K=5/9(F+459.67) K = 5/9F / 5/9 = 255.376667 / 5/9 = F = 5.67503704

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3 years ago

a port and a radar station are 2 mi apart on a straight shore running east and west. a ship leaves the port at noon traveling no

Rom4ik [11]

Answer:

The rate of change of the tracking angle is 0.05599 rad/sec

Step-by-step explanation:

Here the ship is traveling at 15 mi/hr north east and

Port to Radar station = 2 miles

Distance traveled by the ship in 30 minutes = 0.5 * 15 = 7.5 miles

Therefore the ship, port and radar makes a triangle with sides

2, 7.5 and x

The value of x is gotten from cosine rule as follows

x² = 2² + 7.5² - 2*2*7.5*cos(45) = 39.04

x = 6.25 miles

By sine rule we have

$\frac{sin A}{a} = \frac{sin B}{b}$

Therefore,

$\frac{sin 45}{6.25} = \frac{sin \alpha }{7.5}$

α = Angle between radar and ship α

∴ α = 58.052

Where we put

$\frac{sin 45}{6.25} = \frac{sin \alpha }{x}$ to get

$\frac{x}{6.25} = \frac{sin \alpha }{sin 45}$ and differentiate to get

$\frac{\frac{dx}{dt} }{6.25} = cos\alpha\frac{\frac{d\alpha }{dt} }{sin 45}$

$\frac{15sin45 }{6.25cos\alpha } =\frac{d\alpha }{dt} }$ = 3.208 degrees/second = 0.05599 rad/sec.

6 0

3 years ago

What is Lim x → ∞ cos (x) ?

Sergeu [11.5K]

Answer:

non existent

Step-by-step explanation:

Hello, please consider the following.

$\forall \ n \in \mathbb{N}\\\\cos((2n+1)\pi)=0\\\\cos(2n\pi)=1\\\\\text{So, there is no limit possible for } x \rightarrow +\infty$

Thank you.

6 0

3 years ago