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Sonbull [250]
2 years ago
13

For her book club Sharon reed for 45 minutes each day write an expression for the number of hours she reads in d days

Mathematics
1 answer:
Bond [772]2 years ago
5 0
So first u would need tto know how many hours are in a day so there are 24 hours in a day so u would do 45x72 cause there are 72 hours in 3 days.
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In an insect colony there are 270 insects after 9 days. If there were initially 80 insects how long will it take the population
Semenov [28]

Answer:

The time it will take the population to grow to 800 insects is 17 days.

Step-by-step explanation:

The growth function of the insects is exponential.

The exponential growth function is:

y=a(1+r)^{t}

Here,

<em>y</em> = final value

<em>a</em> = initial value

<em>r</em> = growth rate

<em>t</em> = time taken

It is provided that there were 270 insects after 9 days and initially there were 80 insects.

Compute the value of <em>r</em> as follows:

y=a(1+r)^{t}\\\\270=80(1+r)^{9}\\\\3.375=(1+r)^{9}\\\\\ln(3.375)=9\cdot \ln(1+r)\\\\0.135155=\ln(1+r)\\\\1+r=1.14471\\\\r=0.145

Now, compute the time it will take the population to grow to 800 insects as follows:

800=80(1+0.145)^{t}\\\\10=(1.145)^{t}\\\\\ln(10)=t\cdot \ln(1.145)\\\\t=17.00522\\\\t\approx 17

Thus, the time it will take the population to grow to 800 insects is 17 days.

7 0
3 years ago
For the equation 4(x - 2) = 4x + K which value of k will create an equation with no solutions?
lawyer [7]

Step-by-step explanation:

k=8 that is the equation with no solutions

5 0
2 years ago
What’s the answer to this problem?
motikmotik
Answer is c 4.7ft...
3 0
2 years ago
Thanks that helped a lot with my math homework!:):):)
frosja888 [35]
:):):):):):):):):):)
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Jack agrees to sell Tyler his pocketknife for 3 baseball cards. Tyler sells his soccer ball for 2 baseball cards. In what way ar
Sphinxa [80]

Answer:

the baseball cards are used as currency in this example

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