Mathematics College

Suppose that 2% of a population carries antibodies to a virus. For a research project, you need 30 people
with antibodies to the virus. How many people should you test so that the expected number of people with
the antibodies is 30?

Answers

Answer 1

Answer:

1500

Step-by-step explanation:

p = number of people who should be tested

.02p = 30

p = 30/.02

p = 1500

Related Questions

According to the Stack Overflow Developers Survey of 20184, 25.8% of developers are students.The probability that a developer is a woman given that the developer is a student is 7.4%,and the probability that a developer is a woman given that the developer is not a student is76.4%. If we encounter a woman developer, what is the probability that she is a student

Answers

Answer:

0.0326 = 3.26% probability that she is a student.

Step-by-step explanation:

Conditional Probability

We use the conditional probability formula to solve this question. It is

[tex]P(B|A) = \frac{P(A \cap B)}{P(A)}[/tex]

In which

P(B|A) is the probability of event B happening, given that A happened.

[tex]P(A \cap B)[/tex] is the probability of both A and B happening.

P(A) is the probability of A happening.

In this question:

Event A: Woman developer

Event B: Student

Probability that the developer is a woman:

7.4% of 25.8%(students).

76.4% of 100 - 25.8 = 74.2%(not students). So

[tex]P(A) = 0.074*0.258 + 0.764*0.742 = 0.58598[/tex]

Student and woman developer.

7.4% of 25.8%(students), so

[tex]P(A \cap B) = 0.074*0.258 = 0.019092[/tex]

If we encounter a woman developer, what is the probability that she is a student

[tex]P(B|A) = \frac{P(A \cap B)}{P(A)} = \frac{0.019092}{0.58598} = 0.0326[/tex]

0.0326 = 3.26% probability that she is a student.

URGENT PLZZ HELP!!!!

Answers

Answer: 1

Step-by-step explanation:

Since 2 ≥ 2, we only need to look at [tex]x^3-9x^2+27x-25[/tex].

Plugging in 2 for x in this, we get:

[tex]2^3-9(2)^2+27(2)-25[/tex]

[tex]8 - 36 + 54 - 25[/tex]

[tex]1[/tex]

Hence, the answer is A.

Can someone please help

Answers

Answer:

the standard form of the given algebraic expression is

[tex]x + x - 2 + 7[/tex]

[tex] = 2x + 5[/tex]

Answer:

x square -5x -14

Step-by-step explanation:

Formula:

X square + (a+b)x +ab

And then substitute...

Hope it helped you.

A large tank holds ×5107 gallons of oil. How much oil can be stored in 23 tanks

Answers

It would be 120461 gallons of oil.

Multiplicative inverse of 345

Answers

the answer is 0.00289855

Answer:

-0.00289855.

Help me please!!
15 points!

Answers

Answer:

Hi Hi really sorry may i get some points i need them to give it to other people cuz some people want points, ik its not the answer u wanted sorry but hope u get the answer soon!

Step-by-step explanation:

solve this pleaseI will really appreciate it.

Answers

Sorry but I don’t know

IF A CUBE HAS VOLUME OF 1,331 MM, WHAT IS THE AREA OF THE BASE OF IT IN SQUARE MILLIMETERS

Answers

1331= lwh or 1331= x^3

So take cube root of both sides and you will get 11.

Since the formula for area is length times width, the answer is 11x11 which equals 121.

So the square area of the base is 121mm^2



Find the least common denominator of these two fractions. LOTO and 1/ 5 The least common denominator is [?]​

Answers

Answer:

6yx

Step-by-step explanation:

This number will be your least common denominator (LCD). Divide the LCD by the original denominator. To determine the multiple needed to make the denominators equal, divide the LCD you determined by the original denominator. Multiply the numerator and the denominator of each fraction by this number.


New York is 5 hours behind London. It is 15:55 in London,
what time is it in New York using the 24 hour clock?

Answers

Answer:

10:55

Step-by-step explanation:

15:55 - 5 = 10:55

The sum of the squares of two positive numbers is 41 and the difference of the two squares of the numbers is 9. Find the numbers. If there is more than one pair, use the "or" button.

Answers

Answer:

Step-by-step explanation:

41

A total of 46 students signed up to play in a flag football league if each team has 10 students how many more students will need to sign up so all of the students can be on a team show your work

Answers

Answer:

4

Step-by-step explanation:

40÷10=4 so there's 4 teams but there's still 6 but we need 10 in each team so we need to 4 more people to make it equal

Pl help it’s for a grade

Answers

Answer:

c

Step-by-step explanation:

Answer:b

Step-by-step explanation:

Due to the explanation here

1. (a+2)²
2. (a-5)²
3. 3(a+b)
4. (a+2)(a-2)
5. (ab)⁴
6.- 3a(2a + 2b)
7. (2a-3)(a +2)
8. (8a+10b)(8a-10b)
9. (2a-3)³
10.-9a(3a+4b)​

Answers

Answer:

a² + 4a + 4

Step-by-step explanation:

(a + 2) ² = (a + 2) ( a + 2)

= a ( a + 2) + 2 ( a + 2)

= a² + 2a + 2a + 4

= a² + 4a + 4

huh? sorry idont know the answer

lol please help me !

Answers

Answer:  (a + 2)(a - 2)  which is the first answer choice

=========================================================

Explanation:

Use the difference of squares factoring rule which is x^2 - y^2 = (x+y)(x-y)

In this case, x = a and y = 2

x^2 - y^2 = (x+y)(x-y)

a^2 - 2^2 = (a+2)(a-2)

a^2 - 4 = (a+2)(a-2)

Use technology to find points and then graph the line y = 5/3x – 1

Answers

Answer:

Any line can be graphed using two points. Select two x values, and plug them into the equation to find the corresponding y values.

y-int = (0, -1)

x-int. = (3/5, 0)

good luck, i hope this helps :)

10 km=---------miles​

Answers

Answer:

10000

Step-by-step explanation:

because 1 km =1000 m

A bag contains 5 yellow, 6 red, and 4 green marbles. Two marbles are drawn. The first is replaced before the second is drawn. A random variable assigns the number of green marbles to each outcome. Calculate the expected value of the random variable.
a.0.76 c.0.27 b. 1.07 d. 0.53​

Answers

Answer:

53

Step-by-step explanation:

What is the perimeter of the regular hexagon? 3 m meters​

Answers

the perimeter eighteen
No the perimeter is 36

A college has a total of 107 teachers 23 more female teachers than male teachers

What proportion of the teachers are female? use n as the unknown

Answers

Answer:

Female reachers = 65

Step-by-step explanation:

Given that,

Total teachers in a college = 107

Let there are n male teachers.

Female reachers = n+23

ATQ,

n+n+23 = 107

2n = 107-23

2n = 84

n = 42

Female reachers = 42+23

= 65

Hence, there are 65 female teachers.

Marla mixed cream and milk in a ratio of
2 parts cream to 3 parts milk. How many
liters of each did she use if she made 20 liters

Answers

Answer:

If it says she made 20 liters of cream then She has 30 liters of milk

Step-by-step explanation:

2 cream x 10 = 20

3 milk x 10 = 30

Hope this helps!

Plz make me Brainliest.

At a grocery store a 12 pack of 10.75 ounce cans of soup is sold for 15.65 there are 128 oz in a gallon determine the price per gallon round to the nearest cent

Answers

MY THROAT CRAZYYYYYY

Find the product of the least common multiple (LCM) of $8$ and $6$ and the greatest common divisor (GCD) of $8$ and $6$. Please help meh. I

Answers

The lcm is 1 and the gcd is 2

If point N, with coordinates (1, 4) is translated to point N', with coordinates (-1,-1).
which translation did N undergo?
one unit left and three units down
two units left and three units down
two units left and five units down
one unit left and five units down

Answers

it should be 2 units left and 4 units up

Find the value of x, given the figures
are similar.
10
30
36
A) 4
C) 90
B) 108
D) 12

Answers

Answer:

it's 12 cuz 36 divided by 3 is 12

Find the solutions to x2 = 18.
O A.
- +32
B. X = +63
O c. X = +376
O D. X = +2/3

Answers

Answer:

what in the math equations is this???

Step-by-step explanation:

What is the apparent solution to this system of equations?
(Write your answer as an ordered pair)
3
N
1
-2
2
3
5
- 1
-21
-5

Answers

the answer is 123456 okay

The square root of 83 can be plotted on the number line below,
+
8.5 8.6 8.7 8.8 8.9 9,0 9,1 9,2 9,3 94 9,5
Use the drop-down menus to explain where 83 should be plotted on the number line, Click the
arrows to choose an answer for each menu,
The square root of 83 to the nearest tenth is Choose.... · The square root of 83 to the
nearest hundredth is Choose... On the number line above, 83 should be plotted
slightly to the choose... of Choose...

Answers

sdUse the drop-down menus to explain where 83 should be plotted on the number line, Click the

Step-by-step explanation:

Answer: 9.1, 9.11, Right, 9.1

Step-by-step explanation:

Answer please!!!!
Award Brainliest!!!

Answers

Answer:

53

Step-by-step explanation:

60 + 67 = 127

180 - 127 = 53

Your answer will be 53

Factcheck:

60 + 67 + 53 = 180

NEED HELPPPP! This is hard for me to do!

Answers

Answer:

a) This expression is simply the average of both of their hours for a full year.

b) Honestly, I'm not sure, but mathematically, its  [tex]\frac{Beth's -hours}{Arjun's-hours}[/tex], so the hours cancel out and you get the ratio of their yearly hours? Idek

c) a/12 would be the number of hours Arjun worked per month since there are 12 months in a year.

d) This one is a difference between Arjun's hourly wage to Beth's hourly wage. So, it represents how much more Arjun would have made (Arjun's hourly wage) in comparison to Beth, or vice versa (depending on who worked more hours).

c) Similar to a), this is an average of their yearly income.

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