Write the number in scientific notation.85,000
A. 8.5 × 10-4
B. 8.5 × 10-5
C. 8.5 × 104
D. 8.5 × 105
Answer: C
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Solve the problem. Round to tenths where necessary.A baseball team is trying to determine what price to charge for tickets. At a price of $10 per ticket, it averages 45,000 people per game. For every increase of $1, it loses 5,000 people. Every person at the game spends an average of $5 on concessions. What price per ticket should be charged in order to maximize revenue?
A. $4.00 B. $7.00 C. $3.00 D. $13.00
Two marbles are drawn without replacement from a box with 3 white, 2 green, 2 red, and 1 blue marble. Find the probability.The second marble is white given the first marble is blue.
A. 
B. 
C. 
D. 
The pH of a solution is given by the formula 
, where 
is the concentration of hydrogen ions in moles per liter in the solution. Use this formula to solve the problem.The pH value of a substance is 5.42. Find the hydrogen-ion concentration for this substance.
A. 263,026.8 B. 0.0000038 C. 1.7 D. 0.2
Use the quadratic formula to find the exact solutions.x2 + 10x = -21
A. -7, 3 B. -3, -7 C. 3, 7 D. -3, 7