Answer:
A. 450
Step-by-step explanation:
180 is 40% of the original
450*0.4=180
298*0.4=119.2
240*0.4=96
72*0.4=28.8
so A. 450 is correct
Answer:
√13 ≈ 3.6056
Step-by-step explanation:
The Law of Cosines can be used to figure this. If the third side is "c", then it tells you ...
c² = a² + b² - 2ab·cos(C)
c² = 3² + 4² -2(3)(4)(cos(60°)) = 9 + 16 - 24(1/2) = 13
c = √13 ≈ 3.6056
The length of the third side is √13, about 3.6056.
2/5 of 30 = 12
30 + 12 = 42
£42