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marin [14]
3 years ago
14

You plant 30 African violet seeds and 9 of them sprout. Use experimented probability to predict how many will sprout if you plan

t 20 seeds?
Please helpp
Mathematics
1 answer:
iogann1982 [59]3 years ago
6 0

Answer:

Given that out of 30 planted seeds only 9 of the m sprouted, then:

Experimental probability =(number of occurrence of event)/(total number of trials made)

=9/30

=3/10

thus the number of seeds that will sprout given that 20 seeds we planted will be:

3/10×20

=6 seeds


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Exponential growth/decay problem 2
lapo4ka [179]

Answer:

a) decay

b) 2,950,000

c) 0.025

d) f(x)=2950000(0.975)^x

e) 2,409,123

Step-by-step explanation:

<u>Part (a)</u>

Exponential DECAY, since the population was decreasing annually.

<u>Part (b)</u>

Initial amount = 2,950,000 people (in the year 2000)

<u>Part (c)</u>

Decay factor = 2.5% = 0.025 (in decimal form)

<u>Part (d)</u>

General form of exponential decay function:

f(x)=a(1-r)^x

where:

  • a = initial amount
  • r = rate of decay (in decimal form)
  • x = time (in years)

Given:

  • a = 2950000
  • r = 0.025

\implies f(x)=2950000(1-0.025)^x

\implies f(x)=2950000(0.975)^x

<u>Part (e)</u>

To determine the city's population in 2008:

x = 2008 - 2000 = 8

\begin{aligned}\implies f(8) & =2950000(0.975)^8\\ & = 2409123\: \sf(nearest\:whole\:number)\end{aligned}

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Please attach the figure.

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Kendra's dog has and outside pen enclosed by a fence.the area of the pen is 135 square feet of the pen is 15 feet long how wide is it?

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4508227 in expanded form
gulaghasi [49]
Expanded Numbers Form:

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Expanded Factors Form:

<span><span> 4 ×1,000,000 </span><span>+5 ×100,000 </span><span>+0 ×10,000 </span><span>+8 ×1,000 </span><span>+2 ×100 </span><span>+2 ×10 </span><span>+7 ×1 </span></span>
Expanded Exponential Form:

<span><span>4 × 106</span><span>+<span>5 × 105</span></span><span>+<span>0 × 104</span></span><span>+<span>8 × 103</span></span><span>+<span>2 × 102</span></span><span>+<span>2 × 101</span></span><span>+<span>7 × 100</span></span></span>
Word Form:

four million,
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<span>two hundred twenty-seven</span>
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I hope this helps you

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