Ablue paper clip is 1/6 inch wide . a silver paper clip is 3/8 inch wide, and a red paper clip is 1/3 inch wide. what color paper clip has the smallest widths

We have to make all the fractions have the same denominator in order to compare them, so we have to find the GCM(greatest common factor). The greatest common factor is 24, so

3 x 3 = 9    

8 x 3 = 24

9/24

1 x 4 = 4

6 x 4 = 24

4/24

1 x 8 = 8

3 x 8 = 24

8/24

Now we have the fractions 9/24, 8/24, and 4/24. We can compare the numerators and find the smallest number. The length of the blue paper clip which is 4/24 is the smallest width.

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.

total of apples - take away four

6-4 = 2

answer is 2 apples