Find the measure of the numbered angle.
select one:
a. 115
b. 125
c. 120
d. 130

Option B 125°

Step-by-step explanation:

In this problem we need to calculate the measure of angle ∠6

we know that

The measure of the inner angle is the semi-sum of the arcs comprising it and its opposite.

see the attached figure to better understand the problem

∠6=(1/2)[arc AB+arc CD]

(arc AB+arc CD)=360°-(60°+50°)=250°

substitute

∠6=(1/2)[250°]=125°

nothjing

step-by-step explanation:

the largest number of the four options is 1.8 x 10-2

you have it in scientific notation.

1.80 x 10-6   = 0.00000180

1.80 x 10-4   = 0.000180 (bigger, or "less small", than the former one)

so

1.8 x 10-2       = 0.0180. as you see. the "less small", or the biggest one of them all.

as you have negative exponent, it means you are dividing 1.8 by 100 (i.e. moving the dot towards left, two times).

if you had positive exponent for the scientific notation, power of tenths, you would be multiplying times 100 (moving the dot towards right) as below:

1.8 x (10)2 = 180

so. if you have negative exponent in scientific notation, move the dot toward left. if it is positive, toward right as many times the exponent tells you.