Decide on a suitable restriction on the domain so that the function is one-to-one and the range is not changed.f(x) = -x2 + 20
A. [20, ?)
B. [0, ?)
C. [-20, 20)
D. (-?, 19)
Answer: B
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The lists below show five agricultural crops in Alabama, Arkansas, and Louisiana.AlabamaArkansasLouisianasoybeans (s)soybeans (s)soybeans (s) peanuts (p)rice (r)sugarcane (n)corn (c)cotton (t)rice (r)hay (h)hay (h)corn (c)wheat (w)wheat (w)cotton (t)Let U be the smallest possible universal set that includes all of the crops listed; and let A, K, and L be the sets of five crops in Alabama, Arkansas, and Louisiana, respectively. Find the indicated set.A ? L
A. {c, h, n, p, r, s, t, w} B. {c, s} C. {c, n, p} D. {h, n, p, r, t, w}
Solve the problem.The price of a shirt was reduced from 
to 
. To the nearest tenth, what was the percent discount?
A. 42% B. 40% C. 41% D. 4%
Express the complex number in trigonometric form.- 4
- 4i Express your answer in radians.
A. 8
B. 4
C. 8
D. 4
Factor by grouping, if possible.x14 + x9 + x5 + 1
A. (x14 + 1)(x9 + 1) B. (x5 + 1)(x9 + x5) C. (x5 + 1)(x9 + 1) D. (x12 + 1)(x2 + 1)