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3 years ago

Decrease 140g by 25%

Mathematics

2 answers:

Ilia_Sergeevich [38]3 years ago

8 0

Answer:

• let's first get the percentage decrease:

$= { \rm{100\% - 25 \% }} \\ { \rm{ = 75\%}}$

• then multiply the percentage decrease with the mass given:

$= { \tt{75\% \times 140}} \\ \\ = { \tt{ \frac{75}{100} \times 140}} \\ \\ = { \underline{ \tt{ \: \: 105 \: g \: }}}$

Ivanshal [37]3 years ago

6 0

Answer:

let's first get the percentage decrease:

=100%−25%

=75%

• then multiply the percentage decrease with the mass given:

=75%×140

= 75/100 ×140

= 105g

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Answer:

Question 1: $dm/dt=0.2m$

Question 2: $m=Ae^{(0.2t)}$

Question 3: $m=10e^{(0.2t)}$

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Explanation:

Question 1: Write down the differential equation the mass of the bacteria, m, satisfies: m′= .2m

a) By definition: $m'=dm/dt$

b) Given: $rate=0.2m$

c) By substitution: $dm/dt=0.2m$

Question 2: Find the general solution of this equation. Use A as a constant of integration.

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c) Antilogarithm

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Question 3. Which particular solution matches the additional information?

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Question 4. What was the mass of the bacteria at time =0?

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Step-by-step explanation:

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