Abox contains 192 pens, they are red green or blue. a quarter of the pens are red. the ratio of green pens to blue pens = 1: 8. how many blue pens are there?

There are 18 blue pens there

expression=192x0.25=48

192-48=144

144 devided by 8 is 18

the answer is 18

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.