Find the products AB and BA to determine whether B is the multiplicative inverse of A.A = 
,B = 
A. B ? A-1
B. B = A-1
Answer: B
Mathematics
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4a/b + 5b/a =
a. (4a + 5b)/ab b. (4ab + 5b)/ab c. (4a2 + 5b2)/ab d. 9a2b2/ab e. 9ab
Mathematics
A 1 æF capacitor is charged to 100 V. How long will it take to discharge to 10 V through a 1 Meg resistor?
a. 1.8 sec b. 2.3 sec c. 3.9 sec d. 8.4 sec e. 14.9 sec
Mathematics
Solve the problem.There were 11
yards of fabric on a bolt. After a customer bought 
of fabric, how many yards were left?
A. 1
yd
B. 7
yd
C. 17
yd
D. 3
yd
Mathematics
Find the eccentricity e of the hyperbola.x2 - 25y2 = 25
A. 
B. 
C. 
D. 2
Mathematics