Smartphones: A poll agency reports that 38% of teenagers aged 12-17 own smartphones. A random sample of 120 teenagers is drawn. Round your answers to at least four decimal places as needed Part: 0/6 Part 1 of 6 (a) Find the mean mu _(hat (p)) The mean mu _(hat (p)) is 45.6000 Part: 1/6 Part 2 of 6 (b) Find the standard deviation sigma _(hat (p)) The standard deviation sigma _(hat (p)) is square

1 Fill in the Hank 3points Ahistogram can give you the $\square $ the data, the choose your answer. of the data. choose your answer. $\square $ and the $\square $ v choose your answer- choose your answer... end The barsor intervals in a histor shape and represent the data. 2

Apply the distributive property to the expression. $100(0.07a+0.02b)=\square $

51. Find the volume of a pyramid with a square base, where the perimeter of the base is 15.8 ft and the height of the pyramid is 20.4 ft. Round your answer to the nearest tenth of a cubic foot.

4) $v^{1}=$ A) 0 B) 1 OC) v OD) $1/v$

What is the range of the function graphed above? $-\infty \lt y\leqslant 2$ $-\frac {3}{2}\leqslant y\lt \infty $ $-\infty \lt y\lt \infty $ $\{ 2\} $

2. You are inscribing a regular pentagon in a cIrcle. You need to know the angle measure between the vertices. You divide $360^{\circ }$ by what number? 3 s 6

Which equation represents a line that has a slope of $-\frac {1}{2}$ and passes through point $(4,-5)$ $y=-\frac {1}{2}x+\frac {3}{2}$ $y=-\frac {1}{2}x+\frac {13}{2}$ $y=-\frac {1}{2}x-7$ $y=-\frac {1}{2}x-3$

1. If $x+3=7$ then x equals: A. 3 B. 4 C. 5 D. 10

Find the angle $\beta $ between $0^{\circ }$ and $180^{\circ }$ that satisfies the following equation. $21^{2}=20^{2}+29^{2}-(2)(20)(29)cos\beta $ $\beta \approx \square ^{\circ }$ (Round to one decimal place as needed.)

Solve the equation given by completing the square. $5x^{2}+20x-25=0$ [Hint: Divide by 5 first] $x=\square $