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
Shtirlitz [24]
3 years ago
6

The growth of a sample of bacteria can be modeled by the function bt=1001.06t where b is the number of bacteria and t is time in

hours. What is the number of total bacteria after 3 hours?
Mathematics
1 answer:
alukav5142 [94]3 years ago
7 0

Given:

The growth of a sample of bacteria can be modeled by the function

b(t)=1001.06t

where, b is the number of bacteria and t is time in hours.

To find:

The number of total bacteria after 3 hours.

Solution:

We have,

b(t)=1001.06t

where, b is the number of bacteria and t is time in hours.

Substituting t=3, we get the number of total bacteria after 3 hours.

b(3)=1001.06(3)

b(3)=3003.18

Number of bacteria cannot be decimal value. So, approximate the value to the nearest whole number.

b(3)\approx 3003

Therefore, the number of total bacteria after 3 hours is about 3003.

You might be interested in
150 is 96% of what number?<br> SHOW WORK:
goblinko [34]
96 / 150 = 0.64.

.64 x 100 = 64%
5 0
3 years ago
Read 2 more answers
34​% of college students say they use credit cards because of the rewards program. You randomly select 10 college students and a
finlep [7]

Answer:

a) There is a 18.73% probability that exactly two students use credit cards because of the rewards program.

b) There is a 71.62% probability that more than two students use credit cards because of the rewards program.

c) There is a 82% probability that between two and five students, inclusive, use credit cards because of the rewards program.

Step-by-step explanation:

There are only two possible outcomes. Either the student use credit cards because of the rewards program, or they use for other reason. So, we can solve this problem by the binomial distribution.

Binomial probability

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

P(X = x) = C_{n,x}.\pi^{x}.(1-\pi)^{n-x}

In which C_{n,x} is the number of different combinatios of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

And \pi is the probability of X happening.

In this problem, we have that:

10 student are sampled, so n = 10

34% of college students say they use credit cards because of the rewards program, so \pi = 0.34

(a) exactly​ two

This is P(X = 2).

P(X = x) = C_{n,x}.\pi^{x}.(1-\pi)^{n-x}

P(X = 2) = C_{10,2}.(0.34)^{2}.(0.66)^{8} = 0.1873

There is a 18.73% probability that exactly two students use credit cards because of the rewards program.

(b) more than​ two

This is P(X > 2).

Either a value is larger than two, or it is smaller of equal. The sum of the decimal probabilities must be 1. So:

P(X \leq 2) + P(X > 2) = 1

P(X > 2) = 1 - P(X \leq 2)

In which

P(X \leq 2) = P(X = 0) + P(X = 1) + P(X = 2)

So

P(X = x) = C_{n,x}.\pi^{x}.(1-\pi)^{n-x}

P(X = 0) = C_{10,0}.(0.34)^{0}.(0.66)^{10} = 0.0157

P(X = 1) = C_{10,1}.(0.34)^{1}.(0.66)^{9} = 0.0808

P(X = 2) = C_{10,2}.(0.34)^{2}.(0.66)^{8} = 0.1873

P(X \leq 2) = P(X = 0) + P(X = 1) + P(X = 2) = 0.0157 + 0.0808 + 0.1873 = 0.2838

P(X > 2) = 1 - P(X \leq 2) = 1 - 0.2838 = 0.7162

There is a 71.62% probability that more than two students use credit cards because of the rewards program.

(c) between two and five inclusive

This is:

P = P(X = 2) + P(X = 3) + P(X = 4) + P(X = 5)

P(X = x) = C_{n,x}.\pi^{x}.(1-\pi)^{n-x}

P(X = 2) = C_{10,2}.(0.34)^{2}.(0.66)^{8} = 0.1873

P(X = 3) = C_{10,3}.(0.34)^{3}.(0.66)^{7} = 0.2573

P(X = 4) = C_{10,4}.(0.34)^{4}.(0.66)^{6} = 0.2320

P(X = 5) = C_{10,5}.(0.34)^{5}.(0.66)^{5} = 0.1434

P = P(X = 2) + P(X = 3) + P(X = 4) + P(X = 5) = 0.1873 + 0.2573 + 0.2320 + 0.1434 = 0.82

There is a 82% probability that between two and five students, inclusive, use credit cards because of the rewards program.

6 0
3 years ago
1 point
-Dominant- [34]
39
Divide 78 by 2 to get 39 and add in to the number
5 0
3 years ago
Henri has $24,000 invested in stocks and bonds. The amount in stocks is $6,000 more than three times the amount in​ bonds
NikAS [45]

Answer:

s + b = $24,000

And,

s = 3b + $6,000

Step-by-step explanation:

Let us assume the stock be s

And, the bonds be b

So according to the question

It is given that

s + b = $24,000

And,

s = 3b + $6,000

The answers are

s + b = $24,000

And,

s = 3b + $6,000

The same would be considered

7 0
2 years ago
I need help on this, I have no idea what I’m doing
Studentka2010 [4]

which problems? i can teach you how to do them if you want me too.

7 0
2 years ago
Other questions:
  • Stephanie will use a 1 fifth-gallon pitcher to fill an empty 7 eighths-gallon jug for her lemonade stand. How much lemonade will
    12·1 answer
  • The population of at a town has grown 2% each year. In 1998, the population of the town was about 10,000 people. What was the po
    6·1 answer
  • 2x+3y=0 and x+2y=-1 <br> Solve by substitution
    8·1 answer
  • Solve the equation 0.5x = 16 for x using the division property of equality.
    7·2 answers
  • Given the conditional statement "If it is January, then it is winter in the United States," which is true?
    12·1 answer
  • What is the product of (4x + 3)(-2x - 5)?
    5·1 answer
  • Can someone help me with this bonus question for me
    11·1 answer
  • Factoring with GCF worksheet algebra 1
    7·2 answers
  • What is the arc length of an arc with radius 10 in and central angle 60 degrees ? Show your work.
    14·1 answer
  • Help me with this plsss I’ll give brainlist to u
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!