Question a:
Mass = Density × Volume
Density = Mass/Volume
Volume of the tree trunk (the shape of Cylinder) = Area of circular base × height
Volume = [πr²] × h
Volume = [π × 0.25²] × 20
Volume = 3.93 m³
Density = 380 kg/m³
Mass = Density × Volume
Mass = 380 × 3.93
Mass = 1493.4 kg
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Question b)
The growth ring = 4 millimeters = 4÷1000 = 0.004
New diameter = 0.5 + 0.004 = 0.5004
New height = 20 + 0.2 = 20.2
New volume = [πr²] × h
New volume = [π × 0.2502²] × 20.2
New volume = 3.97 m³
5 is common factor
also x
reverse distributive
ab+ac=a(b+c)
5x(x)+5x(4)=5x(x+4)
last one
Answer:
489
Step-by-step explanation:
Answer:
√-16=4√-1=4i
4i is an imaginary number and a complex number.
we can eliminate options 1 and 3 because negative numbers are never greater than positive numbers
2 1/3 as a decimal is 2.33
2 1/6 as a decimal is 2.16
2 1/3 is larger than 2 1/6 so
2 1/3 > 2 1/6 is correct
