A) 12 - (-4) =12+-4
=-16

A) 4 + (-9)
=4-(-9)
=-5

A) -7 + (-6)
=-7-(-6)
= -1

A) -9 - (-4)
=-9+(-4)
=-13

9.55 degrees.

step-by-step explanation:

the given angle is

1 cycle is equal to 2π radians. so 4π will be equal to two cycles.

5.166667π-4π = 1.166667π

hence, this angle goes a little more than negative x axis.

1.166667π-π= 0.166667π

hence, the reference angle is 0.166667π radians.

1 radian = 57.2958 degrees

now, in degrees, this should be equals to 9.55 degrees.

5/20 so 25%

step-by-step explanation:

1st part is 64,000,000

2nd part 500,000

step-by-step explanation: