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sweet-ann [11.9K]
3 years ago
7

Please help!!!!!!!!!!

Mathematics
1 answer:
sammy [17]3 years ago
4 0
Find the length of AB
AB²=20²+15²
AB²=400+225
AB²=625
AB=25

then find AD and BD
20²=AD·25
400=AD·25
AD=16
15²=BD·25
225=BD·25
BD=9
now use the geometric mean theorem (name?) to find CD
CD=√(9·16)
CD=√144
CD=12 cm

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Makovka662 [10]

Answer:

The answer is C.

Step-by-step explanation:

Given formula h(t)=−16t2+v0t+h0 , where v0 is the initial velocity and h0 is the initial height.

In this case, the initial postion is a platform 30ft above ground so h0=+30

The initial velocity is 38 ft/s straight up into the air so v0=+38

h(t)=-16t2+38t+30

When the object hits the ground, h=0.

h=-16t2+38t+30=0

Simplifying 8t2-19t-15=0

(8t+5)(t-3)=0

t=-5/8 or 3

As time cannot be -ve, t=3s. The answer is C.

6 0
2 years ago
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Answer:

<h2> $31,745</h2>

Step-by-step explanation:

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FVn = PV x e^rn

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n = 12 years

plugin values into the formula:

FV₁₂ = $20,000 x e ⁰°⁰³⁸⁵ ⁽¹²⁾

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3 years ago
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Answer:

m<b = 71

m<d = 71

Step-by-step explanation:

Vertical angles = congruence

2x+1=x+36

subtract x

x+1=36

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PLUG IN

m<b = 2x + 1

2(35) +1

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