A statistics professor gives a survey to each of the 20 students in an introductory statistics course. The survey asks the students how many text messages they think they sent yesterday. The data are included below. Use Excel to calculate the
population standard deviation and the population variance.
• Round your answers to one decimal place.
Texts sent yesterday
53
39
16
158
19
24
29
17
64 , 379, 62, 63, 6, 8,74, 14, 199,273,32,92 standard deviation: and variance:

since the airplane is moving with constant speed then the distance travelled can be calculated by x=u*t

in km/h would be:

x=640*3.5=2.240 km

in m/s would be:

u=640 km/h= 640.000 m/h =640.000/ 3600 m/s =177.8 m/s

t= 3.5 h= 3.5 * 3600 s=12.600 s

then x=u*t= 177.8*12.600= 2.240.280 m

b. an equilateral triangle inscribed in a circle

step-by-step explanation:

we are given the figure of two circles having a triangle inside.

now, we know that,

"when a figure is lying inside an another figure, then the outside figure is known as circumscribed figure and the figure lying inside is referred to as the inscribed figure".

as we see that, the circles are containing the triangle completely.

thus, the circles are the circumscribed figures and the triangle is the inscribed figure.

hence, we get, 'an equilateral triangle is inscribed in a circle'.

answer: 88

step-by-step explanation:

a 360 degree rotation

step-by-step explanation: