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.

15%

step-by-step explanation:

use the table and count the number of guesses that has two correct answers.

the following are two correct answers

10010, 01100, 11000

a total of 3 numbers having 2 correct guesses out of 20 questions.

probability of getting 2 correct guesses = the number of questions getting 2 correct answers / total number of questions.

= 3/20

to convert it into percent multiply by 100, we get

= 3/20 * 100

= 15%

the answer is 15%

you.

.632

step-by-step explanation:

6 * 1/10 = 3/5

3*0.01 = 0.03

3/5 + 0.03 = .63

2*0.002 = .002

.63 + 0.002 = .632