Answer:
The length of the petals of this rose is 7 (units)
Step-by-step explanation:
The polar equation of a rose curve is either [tex]r=a\cos n\theta[/tex] or [tex]r=a \sin n\theta[/tex]. The number of rose petals will be n or 2n according as n is an odd or an even integer, while the value of [tex]a[/tex] determines the length of a rose petal. Thus, the length of each petal is 7 as [tex]a=7[/tex].
