Solve the problem.Find a unit vector normal to the plane containing u = -i + j + 4k and v = 2i - 3j + k.
What will be an ideal response?
i + 
j + 
k or - 
i - 
j - 
k
Mathematics
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Use a proportion to solve the problem.Jim drove 400 miles in 8 hours. If he can keep the same pace, how long will it take him to drive 1400 miles?
A. 3200 hr B. 38 hr C. 28 hr D. 56 hr
Mathematics
Solve the problem.Suppose a cost-benefit model is given by 
where y is the cost in thousands of dollars for removing x percent of a given pollutant. Find the cost of removing 35% to the nearest dollar.
A. $2500 B. $1346 C. $875 D. $538
Mathematics
Estimate the sum or difference by first rounding each number to the nearest hundred.899.15 + 359.834 + 449
A. 1700 B. 1500 C. 1800 D. 1600
Mathematics
Evaluate the factorial expression.
A. 504 B. 252 C. 126 D. 30,240
Mathematics