If 2, x,18 and 54 are in proportion then what is the value of x.

What is the measure of ac? 5 units 13 units 26 units 39 units

Assume that 1400 births are randomly selected and 1378 of the births are girls. use subjective judgment to describe the number of girls as significantly high, significantly low, or neither significantly low nor significantly high. choose the correct answer below. a. the number of girls is neither significantly low nor significantly high. b. the number of girls is significantly high. c. the number of girls is significantly low. d. it is impossible to make a judgment with the given information.

Which is the focus of a parabola with equation y2=4x