Write the expression in the standard form a + bi.(5 + 2i)(6 - 4i)
A. 38 + 8i
B. -8i2 - 8i + 30
C. 38 - 8i
D. 22 + 32i
Answer: C
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Convert the number to the indicated base.300seven to base sixteen
A. 33sixteen B. 18sixteen C. 147sixteen D. 93sixteen
Use cross products to determine whether the pair of fractions is equivalent.- 
and - 
A. not equivalent B. equivalent
Solve the polynomial inequality.(x + 4)(x - 4)(x - 8) < 0
A. (8, ?) B. (-?, -4) ? (4, 8) C. (-4, 4) ? (8, ?) D. (-?, 4)
The management of the UNICO department store has decided to enclose an 400ft2 area outside the building for displaying potted plants and flowers. One side will be formed by the external wall of the store, two sides will be constructed of pine boards, and the fourth side will be made of galvanized steel fencing material.
?
?
If the pine board fencing costs $8/running foot and the steel fencing costs $2/running foot, determine the dimensions of the enclosure that can be erected at minimum cost.
?
A. 
B. 
C. ?
D. ?