Solve the problem.Mardi received an inheritance of 
. She invested part at 10% and deposited the remainder in tax-free bonds at 8%. Her total annual income from the investments was 
. Find the amount invested at 10%.
A. $29,000
B. $63,800
C. $30,000
D. $15,000
Answer: C
Mathematics
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Find all the first order partial derivatives for the following function.f(x, y) = ln yx
A. 
= ln y; 
= 
B. 
= 0; 
= - 
C. 
= ln y; 
= - xln y
D. 
= xln y; 
= - 
Mathematics
Add or subtract, if possible. Assume that all variables represent non-negative values. Simplify your answer. -20
-2
- 3
- 3
A. -23
- 
B. -17
- 5
C. -23
- 5
D. -17
+ 
Mathematics
Solve.A small airplane used 34
gallons on fuel on a 5
hour trip. How many gallons of fuel were used for each hour?
A. 6
gal
B. 191
gal
C. 12
gal
D. 6 gal
Mathematics
Find the integral.
A. - ln
+ C
B. 
+ C
C. ln
+ C
D. 
+ C
Mathematics