Using the formula 1° × π/180 = 0.01745rad,
3240 degrees/second = 56.54867 radians/seconds
Answer:
<h3>
B(7, 3)</h3>
Step-by-step explanation:
Point P(5, -1) being the midpoint of AB means that 

and 

3x+40=100
subtract 40 from both sides
3x= 60
divide by 3
x=20
each Sweater cost 20