Find the derivative of the function at P0 in the direction of u.f(x, y, z) = ln(x2 + 2y2 + 8z2), P0(2, 2, 2), u = 3i + 4j
A. 
B. 
C. 
D. 
Answer: B
Mathematics
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Use the distributive property to rewrite the expression. Do not find the product.8(1 + 8)
A. 8 + 1 + 8 B. 8 ? 1 + 8 ? 8 C. 8 ? 1 + 8 D. 8 ? 1 ? 8
Mathematics
Determine whether the fractions are equal.
and 
A. Yes B. No
Mathematics
If posts are spaced 14 feet apart, how many posts are needed for 98 feet of straight-line fence? ?
A. 22 posts B. 8 posts C. 98 posts D. 7 posts E. 9 posts
Mathematics
Solve the problem.A car rental firm charged $25 per day or portion of a day to rent a car for a period of 1 to 8 days. Days 9 to 11 were then "free," while the charge for days 12 through 17 was again 
per day. Let 
represent the total cost to rent the car for t days, where 
Find the total cost of a rental for 
A. $350 B. $41 C. $300 D. $325
Mathematics