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3 years ago

Can someone help me with question 48 please

Mathematics

1 answer:

vova2212 [387]3 years ago

8 0

Answer:

Step-by-step explanation:

48.

The values are greater than 2 and less than OR equal to 6. Thus there will be an open circle on x = 2 and a filled circle on x = 6. Also there will be a dark line between these 2 points. It's choice A.

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3 years ago

A petrol kiosk p is 12 km due north of another petrol kiosk q. The bearing of a police station r from p is 135 degree and that f

tiny-mole [99]

Answer:

Distance between P and R is 40.15 km.

Step-by-step explanation:

From the picture attached,

Petrol kiosk P is 12 km due North of another petrol kiosk Q.

Bearing of a police station R is 135° from P and 120° from Q.

m∠QPR = 180° - 135° = 45°

m∠PQR = 120°

m∠PRQ = 180° - (m∠QPR +m∠PQR)

= 180° - (45° + 120°)

= 180° - 165°

= 15°

Now we apply sine rule in ΔPQR to measure the distance between P and R.

$\frac{\text{sin}(\angle QPR)}{\text{QR}}= \frac{\text{sin}(\angle PQR)}{\text{PR}}=\frac{\text{sin}\angle PRQ}{\text{PQ}}$

$\frac{\text{sin}(45)}{\text{QR}}= \frac{\text{sin}(120)}{\text{PR}}=\frac{\text{sin}(15)}{\text{12}}$

$\frac{\text{sin}(120)}{\text{PR}}=\frac{\text{sin}(15)}{\text{12}}$

PR = $\frac{12\text{sin}(120)}{\text{sin}(15)}$

PR = 40.15 km

Therefore, distance between P and R is 40.15 km.

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3 years ago

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icang [17]

Answer:

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Step-by-step explanation:

Given:

Height of skyscraper = 1,450 feet

Scale model ratio = 1:290

Find:

Height of skyscraper's model.

Computation:

Height of skyscraper's model = Height of skyscraper × Scale model ratio

Height of skyscraper's model = 1,450 × (1/290)

Height of skyscraper's model = 5 feet

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Dmitry_Shevchenko [17]

Answer:

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Step-by-step explanation:

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