Find the partial derivative.Let z = g(x,y) = 5x + 9x2y2 - 8y2. Find 
.
A. 5 + 18xy2
B. 18x2y - 16y
C. 18xy2 - 16y
D. 5 + 18x2y
Answer: B
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Determine if the argument is valid or invalid. Give a reason to justify answer.If you read, then you will have a high score.You do not read. ? You will not have a high score.
A. Valid by the law of syllogism B. Invalid by fallacy of the inverse C. Invalid by fallacy of the converse D. Valid by the law of contraposition
Solve the equation.Solve 5 cos t + 2 = 1.281 for t, where t is a real number in the interval 
. Approximate t to 3 decimal places.
A. 0.475 B. 1.715 C. 1.426 D. 0.493
The pie chart below shows the number of pizzas consumed by college students in a typical month. Use the chart to answer the question. 
What percent of college students consume no pizzas in a typical month?
A. 5% B. 34% C. 2% D. 18%
Solve the problem.The Feldmans bought their first house for 
Over the years they moved three times into bigger and bigger houses. Now, 40 years later, they are ready to retire and want a smaller house like the first one they bought. If inflation in property values has averaged 
per year during that time, how much will such a house cost them now? (Round your answer to the nearest dollar.)
A. $3404 B. $42,303 C. $43,160 D. $3336