Im so confused
1. identify the si unit(s) that would be most appropriate for measuring each of the following:
a) the length of a new pencil (cm)
b) the width of your classroom (dam)
c) the length of your arm (m)
d) the diameter of pencil lead (μm)
2. identify the si unit(s) that would be most appropriate for massing each of the following:
a) a person (m)
b) a banana (
c) your daily vitamin tablet (
d) a pencil (cm)
3. identify the si unit(s) that would be most appropriate for measuring each of the following:
a) a glass of milk
b) the amount of water required to fill a glass of water (
(c) a dose of cough syrup (
(d) a truckload of sand
4. rank the measurements within each set from largest to smallest:
(a) 1.2m, 750cm, .005km, 65dm, and 2000mm
b) 450mg, 3.8cg, .27dg, .50g, and .00047kg
c.) 2.5l, 22cl, 13dl, 870ml, and 175cm3

See below

Explanation:

1. Identify the SI unit(s) that would be most appropriate for measuring each of the following:

A) the length of a new pencil (cm)

B) the width of your classroom (m)

C) the length of your arm (m)

D) the diameter of pencil lead (cm)

2. Identify the SI unit(s) that would be most appropriate for massing each of the following:

A) a person (kg)

B) a banana ( gr)

C) your daily vitamin tablet ( mg)

D) a pencil (gr)

3. Identify the SI unit(s) that would be most appropriate for measuring each of the following:

A) a glass of milk  (ml)

B) the amount of water required to fill a glass of water ( ml)

(C) a dose of cough syrup ( ml)

(D) a truckload of sand  (m³)

4. Rank the measurements within each set from largest to smallest:

(A) 1.2m, 750cm, .005km, 65dm, and 2000mm

65 dm, 750 cm, 65 dm, 2000 mm; 1.2 m

B) 450mg, 3.8cg, .27dg, .50g, and .00047kg

 0.27 dg, 0.50 g, 0.0047 kg, 450 mg, 3.8 cg

c.) 2.5L, 22cL, 13dL, 870mL, and 175cm3

13dL, 2.5L, 870 mL, 22cL, 0.175 L

lol idk man i guess u gotta ask bill nye the science guy