Answer:
The answers to your question are
15.- 45 mg
16.- 25 kg
17.- 185 pounds
18.- 60 mg
Step-by-step explanation:
D = (aM) / (a + 12)
15.-
a = 4 years
M = 180 mg
D = (4 x 180) / (4 + 12)
D = 720 / 16
D = 45 mg
16.-
weigh = 55 pounds
1 pound ------------------ 0.4535 kg
55 pound ----------------- x
x = 55 x 0.4535 / 1 = 24.96 kg ≈ 25 kg
17.- 1 pound ------------------ 0.4535 kg
x ----------------- 84.09 kg
x = 84.09 x 1 / 0.4535
x = 185.42 pounds = 185 pounds
18.- M = 180 mg calculate 1/3
M = 180/3 = 60 mg
