Answer:
See the explanation below.
Step-by-step explanation:

Starting from 
By putting
we have:

Answer:
55.9%
Step-by-step explanation:
To find the percent that are girls, take the number of girls over the total number of students
19/34
.558823529
To change to percent form, multiply by 100%
55.8823529%
To 1 decimal place
55.9%
Answer:
bet
Step-by-step explanation:
The red vector has a magnitude of 22 and makes an angle of 39 degrees with the horizonal x-axis.
Converting to rectangular form: x = 22 cos 39 deg and y = 22 sin 39 deg