Determine whether the argument is valid or invalid. You may compare the argument to a common form, if applicable, or use a truth table.If it is cold, then you need a coat.You do not need a coat. ? It is not cold.
A. Valid
B. Invalid
Answer: A
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Perform the indicated operations.Estimate by rounding to the nearest thousand, then find the actual sum.
A. Estimate: 66,000 Actual: 64,355 B. Estimate: 64,000 Actual: 64,356 C. Estimate: 64,000 Actual: 64,633 D. Estimate: 65,000 Actual: 64,365
Solve the problem.The drop in voltage E across two terminals in an electrical circuit using alternating current is described by the given equation, where t is in seconds. 
Find the maximum voltage drop.
A. 128.5 B. 75 C. 83 D. 29.5
Provide an appropriate response.The time it takes an airplane to travel a given distance with a headwind (against the wind) can be calculated by dividing the distance by the difference of the speed of the airplane and the speed of the wind. Write an equation which calculates the time t it takes an airplane traveling at a speed r against a wind w to cover a distance d. Solve your equation for w.
What will be an ideal response?
Find an equation of the parabola whose graph is shown.
 figure 1.png)