The argument has a true conclusion. Identify the argument as valid or invalid.10 is a real number.
10 is 
.
A. Valid
B. Invalid
Answer: B
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Solve the problem.If a ball is thrown upward at 64 feet per second from the top of a building that is 120 feet high, the height of the ball can be modeled by 
feet, where t is the number of seconds after the ball is thrown. After how many seconds does the ball reach its maximum height?
A. 3.8 sec B. 4 sec C. 1 sec D. 2 sec
Write the whole number in standard form.500,000 + 60,000 + 800 + 7
A. 56,807 B. 506,870 C. 560,870 D. 560,807
Use a calculator to approximate the expression. Write your answer in scientific notation, and round to the nearest tenth as needed.(2.6 × 105) + (3 × 107)
A. 3.2 × 10-7 B. 3.2 × 1012 C. 3.0 × 10-12 D. 3.0 × 107
Solve the problem.It costs $800 to start up a business of selling hot dogs. Each hot dog costs 
to produce. Find the cost function 
whose input is the number of hot dogs and whose output is the total cost. Use this function to find the cost of producing 300 hot dogs?
A. $980 B. $180 C. $860 D. $18,800