Expression px2. p=3,×=4
1 answer:
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Complete the square by using the following form:
The vertex is at (3,7)
The squared term is positive so it opens up and vertex is a minimum.
The vertex is at (3,7)
The squared term is positive so it opens up and vertex is a minimum.
Answer:
r = 6
Step-by-step explanation:
Given that M is directly proportional to r³ then the equation relating them is
M = kr³ ← k is the constant of proportionality
To find k use the condition r = 4 when M = 160
k = =
= 2.5, so
M = 2.5r³ ← equation of proportionality
When M = 540, then
540 = 2.5 r³ ( divide both sides by 2.5 )
216 = r³ ( take the cube root of both sides )
r = = 6