[問題] 請教幾題數學
If x=√0.25, then what is the approximate
value of √x? (m)
(A) 0.50
(B) 0.62
(C) 0.71
(D) 1.22
(E) 1.41
答案為C
If a, b,and c are one of the values of 0, 1 or 2, and
3^2xa+3xb+c=25, what is the value of
a+b+c? (m)
(A) 2
(B) 3
(C) 4
(D) 5
(E) 6
答案為D
If each side length of a pyramid whose base is a square is 10 centimeters, what is the distance from the tip of the pyramid to the center of its square base?
(A) 2√2
(B) 5
(C) 5√2
(D) 10
(E) 10√2
答案為C
If the length of a rectangle is increased by 15% and
the width is decreased by 10%, which of the following is the percent increase in the area of the rectangle? (m-h)
(A) 3.5%
(B) 4.5%
(C) 5.5%
(D) 6.5%
(E) 7.5%
答案為A
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