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`A` varies directly with `r^2` and when `r=6`, `A=432`
Give the constant of proportionality, `k=`
Give the function that relates the relates A and r.
If `r=5`, then `A=`
Give the constant of proportionality, `k=`
Give the function that relates the relates A and r.
If `r=5`, then `A=`
Get help:
Box 1: Enter your answer as a number (like 5, -3, 2.2172) or as a calculation (like 5/3, 2^3, 5+4)
Enter DNE for Does Not Exist, oo for Infinity
12
Box 2: Enter your answer as an equation. Example: y=3x^2+1, 2+x+y=3
Be sure your variables match those in the question
`A = 12 r^2`
Box 3: Enter your answer as a number (like 5, -3, 2.2172) or as a calculation (like 5/3, 2^3, 5+4)
Enter DNE for Does Not Exist, oo for Infinity
300