(1 point) find a⋅b if |a| = 2, |b| = 4, and the angle between a and b is −π7 radians.

a·b  = 7.2

Step-by-step explanation:

Given :

IaI = 2; IbI = 4 ,

Using Dot product formula:

a·b = IaI IbI cos

a·b  = (2) (4) (cos(-\pi/7[/tex])

a·b  = 7.2

Hence Dot product of vector a and b i s:

a·b  = 7.2

alright well the answers to your question is

2xy/9 hope this have a nice day : )

step-by-step explanation:

you meant circumference well the answer is:

17.27876 miles

area is 23.7583

the radius is 2.75 miles

hope this hmu if needed.