How to find the angles of the parallel lines 1& 4

52+ <5 + 47 = 180

99 + < 5 = 180

< 5 = 81

<3 = 47 degrees   alternate interior angles are equal

<3 +<4 = 180  straight line

47 +<4=180

<4 = 133

<2 =52 degrees alternate interior angles are equal

<1 +<2 = 180 straight line

<1 +52 = 180

<1 =128

' x ' doesn't appear anywhere in the drawing, so we can't use anything in the drawing to find its value.

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.