Rounded to the nearest tenth, it’s 3.9.
Rounded to the nearest whole number, it’s 4.
(not specified in question)
Answer:
14 square units
Step-by-step explanation:
If you graph the points your triangle's height will be 4, and base would be 7.
<em>A = 1/2bh 4</em> x 7 = 28, 28 x 1/2 = 14.
Hope this helps :D
The length would be 9.
Area of a square is side^2, so to solve for side, take the square root of 81
Answer:
D = 23.7 miles
Step-by-step explanation:
Given data:
![\theta=84 degrees](https://tex.z-dn.net/?f=%5Ctheta%3D84%20degrees)
Time![= 20 min = \frac{1}{3} hr](https://tex.z-dn.net/?f=%20%3D%2020%20min%20%3D%20%5Cfrac%7B1%7D%7B3%7D%20hr)
Distance of A ![= (60 mi/hr)\times \frac{1}{3} hr =20 mi](https://tex.z-dn.net/?f=%3D%20%2860%20mi%2Fhr%29%5Ctimes%20%5Cfrac%7B1%7D%7B3%7D%20hr%20%3D20%20mi)
Distance of B =![(45 mi/hr)\frac{1}{3} hr = 15 mi](https://tex.z-dn.net/?f=%20%2845%20mi%2Fhr%29%5Cfrac%7B1%7D%7B3%7D%20hr%20%3D%2015%20mi)
Draw a triangle.
By using cosine formula we can determine the distance between them
![D^2 = 20^2 + 15^2 - 2\times 20\times 15\times cos(84)](https://tex.z-dn.net/?f=D%5E2%20%3D%2020%5E2%20%2B%2015%5E2%20-%202%5Ctimes%2020%5Ctimes%2015%5Ctimes%20cos%2884%29)
![D^2 = 625 - 600 cos(84)](https://tex.z-dn.net/?f=D%5E2%20%3D%20625%20-%20600%20cos%2884%29%20)
![D^2 = 625 - 63.2](https://tex.z-dn.net/?f=D%5E2%20%3D%20625%20-%2063.2%20)
![D^2 = 561.8](https://tex.z-dn.net/?f=D%5E2%20%3D%20561.8)
Thus D = 23.7 miles