(2+-4)--3
(2-4)+3
(-2)+3
1
(-4-2)+-3
(-6)-3
-9
Answer:
A = 35 square units
Step-by-step explanation:
Formula to calculate the distance between two points 
and 
is,
d = 
Length of the segment between A(2, 2) and B(9, 2) = 
= 7 units
Length of the segment between B(9, 2) and C(9, -3) = 
= 5 units
Length of the segment between C(9, -3) and D(2, -3) = 
= 7 units
Length of the segment between A(2, 2) and D(2, -3) = 
= 5 units
Therefore, given polygon is a rectangle.
Area of the rectangle = length × width
= 7 × 5
= 35 square units
Area of triangle = 1/2*(6)(8)
Area of triangle = 1/2*48
Area of triangle = 24 sq ft
Area of half circle = 1/2* π*4^2
Area of half circle = 8 π sqft
Area total = 24+8 π
Area total = 49.12 sq ft
Answer:
210°F
110 minutes
Step-by-step explanation:
Given that :
Temperature of cake t minutes after being removed from oven :
f(x)=70+140e^-0.024t
Temperature T the timee it is removed ;
At this point, the time t = 0
f(t)=70+140e^-0.024t
f(x)=70+140e^-0.024(0)
= 70 + 140(1)
= 210°F
how long will it take for the cake to reach a temperature of 80oF
80 = 70+140e^-0.024t
80 - 70 = 140*e^-0.024t
10/140 = e^-0.024t
0.0714285 = e^-0.024t
In(0.0714285) = - 0.024t
−2.639057 = - 0.024t
t = 2.639057 / 0.024
t = 109.9607
t = 110 minutes
