Determine if the graph is symmetric about the x-axis, the y-axis, or the origin. r = 3 cos 5θ

Step-by-step explanation:

r=3 cos 5∅

change ∅ to -∅

r=3cos(-5∅)=3 cos (5∅)

so it does not change.

Hence it is symmetric to x-axis.

change r to -r

-r=3 cos 5∅

or r=-3 cos 5∅

so eq. changes .

Hence it not symmetric to y-axis.

3030 ur welcome

step-by-step explanation:

d. 24+-0.114

step-by-step explanation:

the question requires us to calculate the approximate 95% confidence interval for the mean number of ounces of ketchup per bottle in the sample given the following statistics;

sample mean = 24

standard deviation, σ = 0.4

sample size , n = 49

the confidence interval for a population mean is calculated using the formula;

sample mean ± z-score*(σ/sqrt(n))

the z-score associated with a 95% confidence interval, from the standard normal tables, is;

1.96

substituting these values into the formula;

24 ± 1.96*(0.4/7)

= 24 ± 0.112

from the alternatives given, choice d is closest to the above expression;