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3 years ago

10

A 10-foot ladder is leaning against a wall. If the ladder reaches 8 feet up the wall, how fare is thr base of the ladder from th

e wall?

1 answer:

Sedaia [141]3 years ago

7 0

Answer:

6ft

Step-by-step explanation:

The answer is 6 feet

Have a good day:)

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measurement error that is continuous and uniformly distributed from millivolts is added to the true voltage of a circuit. then t

satela [25.4K]

Question has missing details (Full question below)

Measurement error that is continuous and uniformly distributed from –3 to +3 millivolts is added to a circuit’s true voltage. Then the measurement is rounded to the nearest millivolt so that it becomes discrete. Suppose that the true voltage is 219 millivolts. What is the mean and variance of the measured voltage

Answer:

Mean = 219

Variance = 4

Step-by-step explanation:

Given

Let X be a random variable measurement error.

X has a discrete uniform distribution as follows

a = 219 - 3 = 216

b = 219 + 3 = 222

Mean or Expected value is calculated as follows;

E(x) = ½(216+222)

E(x) = ½ * 438

E(x) = 219

Variance is calculated as follows;

Var(x) = ((b-a+1)²-1)/12

Var(x) = ((222-216+1)²-1)/12

Var(x) = (7²-1)/12

Var(x) = 48/12

Var(x) = 4

8 0

3 years ago

Evaluate the line integral for x^2yds where c is the top hal fo the circle x62 _y^2 = 9

natulia [17]

Parameterize $C$ by

$\mathbf r(t)=\langle x(t),y(t)\rangle=\langle3\cos t,3\sin t\rangle$

where $0\le t\le\pi$ . Then the line integral is

$\displaystyle\int_Cx^2y\,\mathrm dS=\int_{t=0}^{t=\pi}x(t)^2y(t)\left\|\frac{\mathrm d\mathbf r(t)}{\mathrm dt}\right\|\,\mathrm dt$
$=\displaystyle\int_{t=0}^{t=\pi}(3\cos t)^2(3\sin t)\sqrt{(-3\sin t)^2+(3\cos t)^2}\,\mathrm dt$
$=\displaystyle3^4\int_{t=0}^{t=\pi}\cos^2t\sin t\,\mathrm dt$

Take $u=\cos t$ , then

$=\displaystyle-3^4\int_{u=1}^{u=-1}u^2\,\mathrm du$
$=\displaystyle3^4\int_{u=-1}^{u=1}u^2\,\mathrm du$
$=\displaystyle2\times3^4\int_{u=0}^{u=1}u^2\,\mathrm du$
$=54$

6 0

3 years ago

PLZ help me!!!!!!!!!!!!!!!!1

Arte-miy333 [17]

Answer:

80

Step-by-step explanation:

16 × 5 = 80

base × height = area

6 0

3 years ago

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2 × 6 × 3 × 0 × 4 > 12 × 1 × 1 true or false

8_murik_8 [283]

Answer:

The first one is 0 and the second one is 12 so that is false

Step-by-step explanation:

6 0

4 years ago

Read 2 more answers

Help pleaseeeeeeeeeeseeeeeeeeeeww

Tema [17]

Answer:

26

Step-by-step explanation:

Given Angles=90° and 64°

We know that in a triangle

$\boxed{\sf Sum\:of\:angles=180°}$

$\rm \rightharpoonup \: 90 + 64 + x = 180 \\ \rm \rightharpoonup \: 154 + x = 180 \\ \rm \rightharpoonup \: x = 180 - 154 \\ \rm \rightharpoonup \: x = 26$

6 0

3 years ago

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