Find an equation equivalent to r=5/1+cos0 in rectangular coordinates

a. x^2=25-10y
b. x^2=10y-25
c. y^2=10x-25
c. y^2= 25-10x

What is the percent of increase for a population that changed from 438,000 to 561,000

Given the following sampling distribution of one mean with a sample size 49, from a normally distributed population,find the population standard deviation, o.79828588912497

You have 17 cats that live in houses on your street, 24 dogs, 3 fish, and 4 hamsters. what percent of animals on your block are dogs?