Solve the problem.Find the number of 3-digit numbers that can be written using the digits {3, 5, 7, 9}.a. if the digits can be repeated.b. if the digits cannot be repeated.
A. a. 24
b. 64
B. a. 64
b. 24
C. a. 64
b. 6
D. a. 81
b. 24
Answer: B
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Evaluate the indicated trigonometric function of the acute angle ?.If ? is an acute angle of a right triangle and if tan ? = 
, then find the value of sin ?.
A. 
B. 
C. 
D. 
Use an integer to express the number.One country exported $82,700,000 more than it imported, giving it a positive trade balance.
A. 82,700,000 B. -82,700,000
Name the geometry in which the statement is possible. ? Was used to measure distances in the construction of the pyramids in ancient Egypt. ?
A. elliptic B. Euclidean C. hyperbolic
Find the x-value of all points where the function has relative extrema. Find the value(s) of any relative extrema.f(x) = x2 + 2x - 3
A. Relative minimum of 0 at -2. B. Relative minimum of -2 at 0. C. Relative minimum of -4 at -1. D. Relative maximum of -4 at -1.