Foundations of Mathematical Reasoning, In-Class Activities, Lesson 15.C 108 Recall Widmark's equation for BAC. In the case of the average male who weighs 190 pounds, you can simplify Widmark's formula to get 2) B = -0.015t+ 0.022N Forensic scientists often use this equation at the time of an accident to determine how many drinks someone had. In these cases, time (t) and BAC (B) are known from the police report. The crime lab uses this equation to estimate the number of drinks (N). Part A: Find the number of drinks if the BAC is 0.09 and the time is 2 hours. Part B: Since the lab uses the formula to solve for N over and over, it is easier if the formula is rewritten so that it is solved for N. In other words, N is isolated on one side of the equation and all other terms are on the other side. Solve for N in terms of t and B. Part C: Use the new formula to find the number of drinks if the BAC is 0.17 and the time is 1.5 hours. 3) Solve a + 2b = 12 for b. 4) -2 Solve y = for x. Зx-1 5) Solve C for B. D-A ster
Foundations of Mathematical Reasoning, In-Class Activities, Lesson 15.C 108 Recall Widmark's equation for BAC. In the case of the average male who weighs 190 pounds, you can simplify Widmark's formula to get 2) B = -0.015t+ 0.022N Forensic scientists often use this equation at the time of an accident to determine how many drinks someone had. In these cases, time (t) and BAC (B) are known from the police report. The crime lab uses this equation to estimate the number of drinks (N). Part A: Find the number of drinks if the BAC is 0.09 and the time is 2 hours. Part B: Since the lab uses the formula to solve for N over and over, it is easier if the formula is rewritten so that it is solved for N. In other words, N is isolated on one side of the equation and all other terms are on the other side. Solve for N in terms of t and B. Part C: Use the new formula to find the number of drinks if the BAC is 0.17 and the time is 1.5 hours. 3) Solve a + 2b = 12 for b. 4) -2 Solve y = for x. Зx-1 5) Solve C for B. D-A ster
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter2: Solving Equations
Section2.2: The Distributive Property
Problem 45E
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Transcribed Image Text:Foundations of Mathematical Reasoning, In-Class Activities, Lesson 15.C
108
Recall Widmark's equation for BAC. In the case of the average male who weighs 190
pounds, you can simplify Widmark's formula to get
2)
B = -0.015t+ 0.022N
Forensic scientists often use this equation at the time of an accident to determine how
many drinks someone had. In these cases, time (t) and BAC (B) are known from the police
report. The crime lab uses this equation to estimate the number of drinks (N).
Part A: Find the number of drinks if the BAC is 0.09 and the time is 2 hours.
Part B: Since the lab uses the formula to solve for N over and over, it is easier if the
formula is rewritten so that it is solved for N. In other words, N is isolated on one side of
the equation and all other terms are on the other side. Solve for N in terms of t and B.
Part C: Use the new formula to find the number of drinks if the BAC is 0.17 and the time is
1.5 hours.
3) Solve a + 2b = 12 for b.
4)
-2
Solve y =
for x.
Зx-1
5)
Solve
C for B.
D-A
ster
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