Answer:
The wide of river is ![50\ ft](https://tex.z-dn.net/?f=50%5C%20ft)
Step-by-step explanation:
In this problem we know that
Triangles DEG and DEF are congruent by ASA (Angle-Side-Angle) Congruence
therefore
EG=EF
![EG=20*(2\frac{1}{2})=20*\frac{5}{2}=50\ ft](https://tex.z-dn.net/?f=EG%3D20%2A%282%5Cfrac%7B1%7D%7B2%7D%29%3D20%2A%5Cfrac%7B5%7D%7B2%7D%3D50%5C%20ft)
Answer:
77.
Proved
78.
Proved
79.
Proved.
80.
Proved.
Step-by-step explanation:
77. Left hand side
=
=
=
{Since we know,
}
=
= Right hand side (Proved)
78. Left hand side
=
=
{Since
}
=
= Right hand side (Proved)
79. Left hand side
=
=
{Since
}
=
= Right hand side
80. Left hand side
=
=
{Since
}
=
=
= Right hand side. (Proved)
1. The growth rate equation has a general form of:
y = A (r)^t
The function is growth when r≥1, and it is a decay when
r<1. Therefore:
y=200(0.5)^2t -->
Decay
y=1/2(2.5)^t/6 -->
Growth
y=(0.65)^t/4 -->
Decay
2. We rewrite the given equation (1/3)^d−5 = 81
Take the log of both sides:
(d – 5) log(1/3) = log 81
d – 5 = log 81 / log(1/3)
d – 5 = - 4
Multiply both sides by negative 1:
- d + 5 = 4
So the answer is D
-1^3 - -1^2 +1= -1. ...........
Answer:
D. 8/7 × 3 because the fraction is greater than 1.
I hope this helps!