The four angles in a quadrilateral are in the ratio 2:5:6:7. Find the smallest angle in the quadrilateral?

36

Step-by-step explanation:

Quadrilateral's angels always add up to 360. Thus, 2x+5x+6x+7x=360

20x=360 (divide both sides by 20)

x = 18

To find the smallest angle, plugin x into 2x.

2(18)=36

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.