17. Cristina compró dos botes de helado de un litro para consumirlos en la semana. Días
después, quedaba 1/4 de helado en un bote
y 1/2 en el otro, ¿Cuánto helado quedaba en
total?
A)
2
4
B)
3
w/o o/w w/ AN
C)
3
4
D) A

2/6

Step-by-step explanation:

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step-by-step explanation:

7.9m and 4.3°

step-by-step explanation:

let east be +x and north be +y, x = distance * cos θ, y = distance * sin θ  

for 3.5 south, y = -3.5  

for 8.2, x = 8.2 * cos 30 and y = 8.2 * sin 30  

for 15 west, x = -15  

total x = 8.2 * cos 30 – 15 ≈ -7.9  

total y = -3.5 + 8.2 * sin 30 = 0.6  

magnitude = [(8.2 * cos 30 – 15)^2 + 0.6^2)]^0.5  

the magnitude is approximately 7.9 m  

tan θ = y/x = 0.6/-7.9  

the angle is approximately 4.3˚ north of west