48: 17
what is the general equation of a cosine function with an amplitude of 3, a period of 4x, and a horizontal shift of - ?
wost 4x+)
y = 4 *cos(3(x– 5))
y = 3cos(4x(x+5))
y = 3cos(0.5(x+x))
y - 4x00s(o 2(x+x))

Can you simplify 4/7? 24 points will be awarded!

The parabola opens: y=√x-4 (principal square root) up down right left

The first-serve percentage of a tennis player in a match is normally distributed with a standard deviation of 4.3%. if a sample of 15 random matches of the player is taken, the mean first-serve percentage is found to be 26.4%. what is the margin of error of the sample mean? a. 0.086% b. 0.533% c. 1.11% d. 2.22%