Part A:
[$25-( $0.50×22)]÷$2=n
Part B:
[$25-($0.50×22)]÷$2=n
[$25-($11)]÷$2=n
[$14]÷$2=n
7=n
Part C: Brandon purchased 7 meals last month.
Answer:
the answer is 529
Step-by-step explanation:
divide 7,406 and 14 and the answer is 529
Found a complete text of the above question:
<span>After giving a statistics exam, professor Dang determined the following five number summary for her class results: 57 65 75 88 97
Use this information to draw a box plot of the exam scores. Choose the correct graph below.
57 and 97 serves as the whiskers of the box plot. 57 is the minimum number while 97 is the maximum number.
65 and 88 serves as the ends of the box while 75 is the line found inside the box.
Choices of for the correct graph is attached but my answer is graph B.</span>
Answer:
268 mg
Step-by-step explanation:
Let A₀ = the original amount of caffeine
The amount remaining after one half-life is ½A₀.
After two half-lives, the amount remaining is ½ ×½A₀ = (½)²A₀.
After three half-lives, the amount remaining is ½ ×(½)²A₀ = (½)³A₀.
We can write a general formula for the amount remaining:
A =A₀(½)ⁿ
where n is the number of half-lives
.
n = t/t_½
Data:
A₀ = 800 mg
t₁ = 10 a.m.
t₂ = 7 p.m.
t_½ = 5.7 h
Calculations:
(a) Calculate t
t = t₂ - t₁ = 7 p.m. - 10 a.m. = 19:00 - 10:00 = 9:00 = 9.00 h
(b) Calculate n
n = 9.00/5.7 = 1.58
(b) Calculate A
A = 800 × (½)^1.58 = 800 × 0.334 = 268 mg
You will still have 268 mg of caffeine in your body at 10 p.m.