<BAC = <DEC = 30°
<BCA = <DCE = 70°
<CDE (or m<D) = 180° - <DEC - <DCE
<CDE = 180° - 30° - 70°
<CDE = 80°
The number that belongs in the green box is 80
Answer:
12 hours
Step-by-step explanation:
Let's set the speed as "s".
Remember that distance = speed * time
So, plugging the numbers given...
7 = s * 8.4
Divide both sides by 8.4
s = 5/6
Now, plug this into the distance = speed * time, with the distance being 10. Set the time as "t"
10 = 5/6 * t
Divide both sides by 5/6
12 = t
So, it would take 12 hours for the snail to crawl 10 miles.
Answer:
87.9
Step-by-step explanation:
Lets assume the sides of the isosceles triangle are:
Side A: x
Side B: x
Base: x/2
x+x+x/2= 46.8cm
2x+x/2=46.8cm
4x+x=93.6
5x=93.6
x= 18.72
Side A: 18.72cm
Side B: 18.72cm
Base: 9.36cm
The base of the largest triangular flag Sara can make is 9.36cm.
2x+x/2= 46.8cm
Answer:
[2.1, 3]
Step-by-step explanation:
Given the height of the ball modelled by the equation;
h(t) =-4.9t^2+25t+6
Required
Domain for 36.9m
To get that we are to find the value of the input variable which is the time t when h(t) = 36.9
Substitute
36.9 = -4.9t^2+25t+6
multiply through by -10
-369 = 49t²-250t-60
49t²-250t-60 + 369 = 0
49t²-250t+309 = 0
Find the domain of t
49t²-147t-103t+309 = 0
49t(t-3)-103(t-3) = 0
(49t-103)(t-3) = 0
49t - 103 = 0 and t-3 = 0
49t = 103 and t = 3
t = 103/49 and t = 3
t = 2.1 and t = 3
Hence the reasonable domain for 36.9m is [2.1, 3]
