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polet [3.4K]
3 years ago
7

Find the circumference of a circle with radius = 30 mm.

Mathematics
2 answers:
3241004551 [841]3 years ago
8 0

Answer:

r= 15

Step-by-step explanation:

OLEGan [10]3 years ago
7 0

188.4mm you do 60(3.14)

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Concur Technologies Inc is a large expense-management company located in Redmond Washington. The wall street Journal asked Concu
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Answer:

Step-by-step explanation:

Hello!

Given the variables

X: daily hotel room rate

Y: amount spent on the entertainment

See second attachment for scatter plot.

The population regression equation is E(Yi)= α + βXi

To estimate the y-intercept and the slope of the regression equation you have to apply the following formulas:

b= \frac{sum XY-\frac{(sumX)(sumY)}{n} }{sumX^2-\frac{(sumX)^2}{n} }

a= Y[bar]-bX[bar]

n= 9; ∑X= 945; ∑X²= 103325; ∑Y= 1134 ∑Y²= 148804; ∑XY= 123307

X[bar]= ∑X/n= 945/9= 105

Y[bar]= ∑Y/n= 1134/9= 126

b= \frac{123307-\frac{945*1134}{9} }{103325-\frac{(945)^2}{9} }= 1.03

a= 126 - 1.03*105= 17.49

^Y= 17.49 + 1.03Xi

Slope interpretation: The estimated average amount spent on entertainment increases 1.03 every time the daily hotel room rate increases one unit.

If the room rate for Chicago is $128 (X), to predict the mount spent in entertainment (Y) you have replace it in the estimated regression line:

^Y= 17.49 + 1.03Xi= 17.49 + 1.03*128= 149.33

The expected amount spent on entertainment for Chicago is $149.33

I hope this helps!

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(a) What is wrong with the following equation?
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The numerator and denominator need parentheses for clarity.
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Share 56 sweets in the ratio 2 : 5.
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The equation T^2=A^3 shows the relationship between a planet’s orbital period, T, and the planet’s mean distance from the sun, A
jenyasd209 [6]
T^2 = A^3
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Time = <span> <span> <span> 2.8284271247 </span> </span> </span>





5 0
3 years ago
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