Suppose 100 people counted the number of cars passing an intersection in one hour. Due to error, not all people get the same value. The mean is 75 and the standard deviation is 1. Use the sketch to find how many people report the following. 
Between 74 and 76 cars
A. 50 people
B. 34 people
C. 84 people
D. 68 people
Answer: D
Mathematics
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Solve the problem.The half-life of silicon-32 is 710 years. If 50 grams is present now, how much will be present in 700 years? (Round your answer to three decimal places.)
A. 25.245 g B. 0 g C. 0.054 g D. 46.697 g
Mathematics
Provide an appropriate response.Solve the system of equations using the substitution method:2x + 3y = 13x - 4y = 27
A. x = 5, y = -3
B. inconsistent; no solution
C. x = -3, y = 5
D. x = -41
, y = 28
Mathematics
Solve. Write your answer in simplest form.Of a family's $840 weekly income, $84 usually goes toward groceries. What fraction of the family's weekly income is usually spent on groceries?
A. 9
B. 
C. 10
D. 
Mathematics
Identify as an equation or an expression.-5(2 - x) + 
A. Equation B. Expression
Mathematics