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just olya [345]
4 years ago
13

Enter an equation for the function. Give your answer in the form a(b)". In the event that a = 1, give your

Mathematics
1 answer:
Anna [14]4 years ago
8 0

Answer:

r(n)=14,000(0.50)^n

Step-by-step explanation:

we know that

The equation of a exponential decay function is equal to

r=a(1-r)^n

where

r is the number of bacteria remaining

n is the number of hours since the  antibiotic was applied

a is the initial value

r is the rate of change

we have

a=14,000\ bacteria\\r=50\%=50/100=0.50

substitute

r(n)=14,000(1-0.50)^n

r(n)=14,000(0.50)^n

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Bryan estimates the cost of a vacation to he $730. the actual cost if the vacation is $850. Find the percent positive or negativ
dusya [7]

Answer:

85.88%

Step-by-step explanation:

put $730 as a fraction with the denominator of $850 and then you get 730/850 then convert it to a decimal and then the decimal to a percent

4 0
3 years ago
A dairy needs 365 gallons of milk containing 7% butterfat. How many gallons each of milk containing 9% butterfat and milk contai
azamat

The amount in gallons of each milk containing 9% butterfat and milk containing 4% butterfat which must be used to obtain the desired 365 gallons are;

  • 219 gallons of 9% fat.
  • 146 gallons of 7% fat.

<h3>What quantity of each type of milk is required for the desired 365 gallon?</h3>

It follows from the task content that the quantity of each type of milk required to arrive at the targeted fat content and quantity of milk are to be determined.

Let x = quantity of 9% fat milk and

Let y = quantity of 4% fat milk

Therefore, by mass balance; we have;

x + y = 365.

Where; y = 365 - x.

Also, by fat balance; we have;

(9% × x) + (4% × y) = (7% × 365)

9x + 4y = 2555

Therefore, the two equations to be solved simultaneously by substituting y from the first equation into the second equation as follows;

9x + 4 (365 - x) = 2555

5x = 1095

x = 1095/5

x = 219 gallons.

Also, y = 365 - 219 = 146 gallons.

Read more on simultaneous equations;

brainly.com/question/16863577

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6 0
1 year ago
The stock market dropped 220 points on Monday. It lost another 48 points on Tuesday, and on Wednesday, it gained 96 points. What
Mariana [72]

Answer:

The amount of change was 172

8 0
3 years ago
Read 2 more answers
10.) please help, thank you so much ☺️
zavuch27 [327]

Answer:

My kids are dead

Step-by-step explanation:

4 0
3 years ago
An oval track is made by erecting semicircles on each end of a 60m by 120m rectangle. Find the length of the track and the area
vodomira [7]
Refer to the figure shown below.

Because the question states that the semi circles are at the ends of the rectangle, each semicircle has a radius of 30 m.

The circumference of the oval is
2π(30) + 2*120 = 60π + 240 m = 428.5 m

The area of the oval is 
π(30²) + 60*120 = 900π + 7200 m² = 1.0027 x 10⁴ m²

Note:
If the semi circles are placed on the 120-m sides of the rectangle, then similar calculations yield:
Circumference = 120π + 120 m = 497 m
Area = 3600π + 7200 m² = 1.851 x 10⁴ m²

Answer:
If the semi circles are placed on the 60-m sides of the rectangle, then
Circumference = 60π + 240 m, or 428.5 m
Area = 900π + 7200 m², or 1.0027 x 10⁴ m²

if the semi circles are placed on the 120-m sides of the rectangle, then
Circumference = 120π + 120 m, or 497 m
Area = 3600π + 7500 m², or 1.851 x 10⁴ m²


3 0
4 years ago
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