Step-by-step explanation:
Hey there!!
Given,

Comparing it with ax^2+bx+c =0 we get,
a= 1, b= 8, c= -5.
Using formula,

Keep all values,




Taking negative,



Similarly, taking positive,



Therefore, x= (4 + root 21, 4 - root 21).
<em><u>Hope it helps</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em>
It costs 0.06 cents each minute.
Explanation : $15/250 minutes = $0.06
<h3><u>Ⲁⲛ⳽ⲱⲉⲅ</u><u>:</u></h3>

<h3><u>Ⲋⲟⳑⳙⲧⳕⲟⲛ:</u></h3>
Here, we area provided a cone with:
- Radius = 48m
- Height = 68 m
We have to find the volume of the cone in feet³, and we are given that 1m = 3.2808ft
<h3><u>Ⳙ⳽ⲓⲛⳋ ⳨ⲟⲅⲙⳙ</u><u>ⳑɑ</u><u>:</u></h3>
The volume of a cone is equal to one third of the volume of a cylinder having the same base radius and height ,i.e:

<u>Therefore</u><u>,</u><u> </u><u>Volume:</u>





![\implies\quad \tt { V = 163,983.36 \times (3.2808)^3 \qquad\quad\bigg[ As, \: 1m = 3.2808ft\bigg]}](https://tex.z-dn.net/?f=%20%5Cimplies%5Cquad%20%5Ctt%20%7B%20V%20%3D%20163%2C983.36%20%5Ctimes%20%283.2808%29%5E3%20%5Cqquad%5Cquad%5Cbigg%5B%20As%2C%20%5C%3A%201m%20%3D%203.2808ft%5Cbigg%5D%7D)


ㅤㅤㅤ~<u>H</u><u>e</u><u>n</u><u>c</u><u>e</u><u>,</u><u> </u><u>the </u><u>volume </u><u>of </u><u>given </u><u>cone </u><u>is </u><u>5,790,806.5</u><u> </u><u>f</u><u>t</u><u>³</u><u>.</u>
Answer:
$29.67
Step-by-step explanation:
first you would fin out how much the total would be with the sales tax( which is equal to $4.89) added to the initial cost which should add up to $77.39
the 15% tip would add $11.61 to the $77.39
divide 89 by 3 which should give you 29.67
replace 15 for t in the equation
V915) = 20 + 7 cos(15) = 26.76148078 feet per second
26.76148078 x 15 = 401.4222118 feet
round off to 401.42 feet