Answer:
Step-by-step explanation:
Area of triangle =
Here, s is the semi-perimeter,
and a,b,c are the sides of the triangle
Given that the triangle is equilaterial
Since all sides of equilaterial triangle equal
∴
Semi-Perimeter =
Area of triangle
Putting
Area of signal board =
= √3a/2×a/2×a/2×a/2
=
If perimeter is 180cm
Perimeter= 180cm
a + a + a= 180cm
3a=180cm
a=
a= 60cm
Putting a=60 cm in (1)
Area of triangle =
Area of triangle
Area of triangle =
Area of triangle=
6•40+6•5 will be the correct answer since 6x45 equals 270 and the second one equals to that so that will be your answer
Answer: 50 minutes
Step-by-step explanation:
Given the following :
Overheating temperature T0 = 280°F
Driving temperature T = 230°F
Ourltside temperature TR = 80
Cooling rate r = 0.0058
Using Newtons law of cooling
T = (T0 - TR)e^(-0.0058t) + 80
230 = 200e^(-0.0058t) + 80
150 = 200e^(-0.0058t)
(150/200) = e^(-0.0058t)
0.75 = e^(-0.0058t)
In 0.75 = (-0.0058t)
-0.2877 = -0.0058t
t = - 0.2877/0.0058
t = 49.60
t = 50 minutes (to the nearest whole number)
Answer:
3/7
Step-by-step explanation:
the slope of the line is
-1 -6/ 3-0 = -7/3
the slope of the perpendicular line is:
3/7
Hi there the answers are 3.2, 1.8, 8.6, and 17.12. Pls mark as brainliest!!!!!!