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3 years ago

Please help asap question is attached

Mathematics

1 answer:

Ksju [112]3 years ago

5 0

Answer:

=(4²/3²)×(2³/3³)×1/4

=16/9×8/9×1/4

=32/81

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To the nearest 0.01 degree, what angle of descent (angle of depression) must a plane 50 horizontal miles from the airport and at

HACTEHA [7]

20,000÷50=
$20000 \div 50 = 400ft$
The plane needs to descend at 400 ft per mile.

At 40 degrees?

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3 years ago

A school custodian waxed the gymnasium floor that measured 20 feet by 20 feet. How many square feet did she have to wax?

Irina-Kira [14]

Hey there, all you do is multiply 20 by 20, 20×20=400. Therefore, the answer is 400 square feet.

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3 years ago

Un buzo realizó los siguientes descensos desde la superficie: Descenso 1: -25 m Descenso 2: -15 m Descenso 3: -25 m ¿A qué dista

dimulka [17.4K]

Answer:

no habla espanol

Step-by-step explanation:

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3 years ago

Please help with this calculus problem!

ELEN [110]

$\dfrac{\mathrm dQ}{\mathrm dt}=\dfrac{a(1-5bt^2)}{(1+bt^2)^4}$
$Q(t)=\displaystyle\int\frac{a(1-5bt^2)}{(1+bt^2)^4}\,\mathrm dt$

Let $t=\dfrac1{\sqrt b}\tan u$ , so that $\mathrm dt=\dfrac1{\sqrt b}\sec^2u\,\mathrm du$ . Then the integral becomes

$\displaystyle\frac a{\sqrt b}\int\frac{1-5b\left(\frac1{\sqrt b}\tan u\right)^2}{\left(1+b\left(\frac1{\sqrtb}\tan u\right)^2\right)^4}\sec^2u\,\mathrm du$
$=\displaystyle\frac a{\sqrt b}\int\frac{1-5\tan^2u}{(1+\tan^2u)^4}\sec^2u\,\mathrm du$
$=\displaystyle\frac a{\sqrt b}\int\frac{1-5\tan^2u}{\sec^6u}\,\mathrm du$
$=\displaystyle\frac a{\sqrt b}\int(\cos^6u-5\sin^2u\cos^4u)\,\mathrm du$
$=\displaystyle\frac a{\sqrt b}\int(6\cos^2u-5)\cos^4u\,\mathrm du$

One way to proceed from here is to use the power reduction formula for cosine:

$\cos^{2n}x=\left(\dfrac{1+\cos2x}2\right)^n$

You'll end up with

$=\displaystyle\frac a{16\sqrt b}\int(5\cos2u+8\cos4u+3\cos6u)\,\mathrm du$
$=\displaystyle\frac a{16\sqrt b}\left(\frac52\sin2u+2\sin4u+\frac12\sin6u\right)+C$
$=\dfrac a{32\sqrt b}(5\sin2u+4\sin4u+\sin6u)+C$
$Q(t)=\dfrac{at}{(1+bt^2)^3}+C$

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3 years ago

When y=75,x=1 over 2 what is the value of y when x is 2 and 1/4

Montano1993 [528]

Answer:

idk

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers