Answer:
(a) By cosine rule, /PQ/2=202+152−2×20×15×cos145°
= 400+225−600cos145°
= 625+600×0.8192
= 491.52+625
/PQ/2=1116.52⟹/PQ/=1116.52−−−−−−√=33.41
≊33km ( to the nearest whole number)
(b) By sine rule,
sin<QPR15=sin14533.41
sin<QPR=15sin14533.41
sin<QPR=15×0.573633.41=0.2575
<QPR=14.92°
∴ Bearing of Q from P = 25° + 14.92° = 39.92°.
≊40° (to nearest whole number)
Step-by-step explanation:
hope it helps
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Answer:
Step-by-step explanation:
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3. 5/8 and 30/48 because 5 can go into 30 and 8 can go into 48
Answer:
D. the sale of beer and ice cream may both be affected by another variable such as the outside temperature.
Step-by-step explanation:
A. There is no evidence to indicate that the positive correlation observed is an error.
B. Even though there is a positive correlation between beer and ice cream sales, there is no evident cause and consequence relationship.
C. The relationship isn't necessarily linear.
D. It is plausible to assume that the sales of beer and ice cream are both affected by another variable like temperature. Both of the products are usually consumed cold and should see an increase in sales during warmer seasons and a decrease in sales during colder seasons.
