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Serga [27]
3 years ago
6

When a student is selected at random from a population of high school students, the

Mathematics
1 answer:
horrorfan [7]3 years ago
5 0

Answer:

Pr(tablet given smartphone) = 18%

Step-by-step explanation:

Let:

probability that the student has a smartphone = Pr(smart phone)

Pr(smart phone) =0.71

the probability that the student has a tablet = Pr(tablet)

Pr(tablet) = 0.28

the probability the student has both = Pr(both)

Pr(both) = 0.13

the probability a student has a tablet given they have a smartphone = Pr(tablet given smartphone)

Pr(tablet given smartphone) = Pr(tablet & smartphone)/Pr(smart phone)

Pr(tablet given smartphone) = 0.13/0.71

Pr(tablet given smartphone) = 0.183 = 18.3%

Pr(tablet given smartphone) = 18%

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Un robot en Marte tiene los siguientes desplazamientos antes de lograr encontrar el lugar con las coordenadas indicadas para emp
sineoko [7]

Answer:

El desplazamiento total del robot es de aproximadamente 17.4 m 12.35° al sur del este

Step-by-step explanation:

El movimiento del robot en Marte se da como sigue;

1) El desplazamiento sur = 25 m

2) El desplazamiento 15 ° al norte del este = 35 m

3) El desplazamiento 37 ° al norte del oeste = 20 m

Por lo tanto, tenemos la moción en forma vectorial;

1) -25\hat j

2) 35·cos(15°)\hat i + 35·sin(15°)\hat j

3) -20·cos(37)\hat i + 20·sin(37°)\hat j

Por lo tanto, tenemos el desplazamiento resultante total, R, del robot está dado por la suma de los vectores como sigue;

R =  (35·cos(15°) - 20·cos(37)) \hat i + (35·sin(15°) + 20·sin(37°) - 25)\hat j

R = 17.8346937192 \hat i - 3.9050329583 \hat j  

La magnitud de R = √ ((17.8346937192) ² + (-3.9050329583) ²) ≈ 17.4 m

La magnitud de R ≈ 17,4 m

La dirección de R = Arctan ((- 3.9050329583) / (17.8346937192)) ≈ -12.35 °

La dirección de R ≈ -12,35 °

La dirección es aproximadamente 12,35 ° al sur del este

El desplazamiento total del robot es de aproximadamente 17.4 m 12.35 ° al sur del este

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