1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
balandron [24]
3 years ago
15

A virus that initially infected four people is spreading at a rate of 15% each week.

Mathematics
1 answer:
Solnce55 [7]3 years ago
8 0

Answer:

"f(x) = 4(1.02)7x; spreads at a rate of approximately 2% daily"

Step-by-step explanation:

<u>Complete Question:</u>

A virus that initially infected four people is spreading at a rate of 15% each week. The following function represents the weekly spread of the virus: f(x) = 4(1.15)x. Rewrite the function to show how quickly the virus spreads each day and calculate this rate as a percentage.

f(x) = 4(1.15)7x; spreads at a rate of approximately 1.5% daily

f(x) = 4(1.02)7x; spreads at a rate of approximately 2% daily

f(x) = 4(1.157)x; spreads at a rate of approximately 2.66% daily

f(x) = 4(1.02)x; spreads at a rate of approximately 0.2% daily

<u>Solution:</u>

The weekly number of people infected would be:

f(x)=4(1.15)^x

7 days in a week, so daily number of people infected would be:

f(x)=4(1+r)^{7x}

To find daily rate, we set these 2 equations equal and solve for r:

4(1.15)^x=4(1+r)^{7x}\\1.15^x=(1+r)^{7x}\\1.15^x=((1+r)^7)^x\\1+r=1.02\\r=1-1.02=0.02

That is 0.02*100 = 2% daily

2nd answer choice is right.

You might be interested in
What is the slope of y = 5x?
9966 [12]

Answer:

The slope of the line is -5

4 0
3 years ago
Read 2 more answers
Help please first with the right answer will be marked brainlyest
andre [41]
I believe this is correct

5 0
3 years ago
Read 2 more answers
Rex puts $5,000 in a savings account with a simple
Mashcka [7]

Answer:

Rex earns $250 in interest after 2 years.

Step-by-step explanation:

5 0
3 years ago
Maya shaved her head and then began letting her hair grow. She represents the length l of her hair, in
Drupady [299]
B

For example if it has been 2 months (l=1.25 times 2) the length would be 1.5 cm
3 0
3 years ago
The nine-digit number that identifies the bank that a check came from is called
Neko [114]

Answer: A

Step-by-step explanation:

7 0
3 years ago
Other questions:
  • 5 and 6? i got 3 for both
    7·1 answer
  • Help me please!!!!!!!!!!!!!
    5·2 answers
  • 5.
    9·1 answer
  • WILL GIVE BRAINLIEST
    12·1 answer
  • Characteristics of Relations
    10·1 answer
  • What does The Bureau of Consumer Protection do for consumers?
    5·1 answer
  • The function ​f(x)​ is the height of a model rocket x seconds after launch.
    5·1 answer
  • A box office sold 147,523 tickets for an auto race.
    5·1 answer
  • Which of the following equations is used to calculate the probability of event A happening, given that event B has occurred?
    8·1 answer
  • A fox leaves its den and travels 725 yards northeast, then 950 yards west. How far, in yards is the fox from its den
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!