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
Alla [95]
3 years ago
14

A survey indicated that 2 out of 4 doctors used brand X aspirin. If 1000 doctors used brand X, how many doctors were surveyed? P

lease show work!
Mathematics
1 answer:
Ratling [72]3 years ago
8 0
We can set this up as a proportion.

Since 2 is proportional to 1000, then 4 is proportional to "doctors surveyed".

\frac{2}{4}  =  \frac{1000}{d} where d is the doctors surveyed.

Cross multiply.

2d = 4000
d=2000

2000 doctors were surveyed.
You might be interested in
A box without a top is made from a rectangular piece of cardboard, with dimensions 27 centimeters by 18 centimeters, by cutting
GaryK [48]
By cutting each corner we have that the resulting dimensions are:
 27 - 2x
 18 - 2x
 Height = x
 Therefore, the volume of the box in terms of the variable x, is given by:
 V (x) = (x) * (27-2x) * (18-2x)
 Answer:
 
The volume of the box in terms of x is:
 
(27-x) (18-x) x
8 0
3 years ago
Read 2 more answers
What are the intercept(s) of ƒ(x) = x2?
IgorC [24]
There are no intercepts. (o,o)
4 0
2 years ago
Which ordered pair represents the y-intercept of the graph of the equation y = –4x – 7?
Dovator [93]
If <span>y = –4x – 7, the x-intercept is found by setting y=0 and solving for x:

</span><span>0 = –4x – 7  =>  4x = -7, or   x = -7/4       The x-intercept is (-7/4, 0).

</span><span>The y-intercept is found by setting x = 0 and reading off the value of y:

y = –4x – 7  =>  y = 0 - 7, or y = -7.  The y-intercept is (0, -7).</span>
7 0
3 years ago
Eva, David and Joshua gather and shell 2 1/2 pounds, 4 3/8 pounds and 3.25 pounds how many pounds would each person she'll?
Andreyy89
I dont know how to this but you probably make 4 3/8 and 2 1/2 into a decimal add all them together...

7 0
3 years ago
6) The amount of Jen's monthly phone bill is normally distributed with a mean of $70 and a standard
alexandr402 [8]

Answer:

i)The correct option is  D.) 99.74%

ii) The correct option is B.) 68.26%

Step-by-step explanation:

i) P(10≤X≤70) = P(  (10−40)/10  ≤Z≤   (70−40 )/10 ) =  Pr(−3≤Z≤3)

= 0.9987 - 0.0013 = 0.99734

Therefore the percentage of Jen's monthly phone bills are between $40 and $100 is D.) 99.74%

ii)P(2.1≤X≤3.1) = P(  (2.1 − 2.6) /0.5   ≤ Z  ≤ (3.1−2.6 )/0.5)  =  Pr(−1  ≤Z  ≤1) )

=  0.8413 − 0.1587  =  0.6826

Therefore the percentage of students at college have a GPA between 2.1 a,d 3.1 is B.) 68.26%

5 0
3 years ago
Other questions:
  • Katie cut out a rectangular piece of wrapping paper that was 2 times as long and 3 times as wide as the box that she was wrappin
    13·2 answers
  • What is the sum of ten terms of an infinite geometric series if the first term is 8 and the ratio is 1/2
    6·1 answer
  • In which example are the events independent? A) Ariel has a standard deck of 52 cards. She draws one card from the deck and then
    10·2 answers
  • What is the solution for this inequality? 8x ≤ -32
    13·1 answer
  • Did I do the reasons right?
    12·2 answers
  • Find the perimeter of the polygon shown in the figure.
    13·2 answers
  • Can someone please help?
    5·1 answer
  • Seventh grade) R.14 Add and subtract line Simplify the expression: 10(4 + 2y) Submit​
    8·1 answer
  • How many adult tickets were sold if each adult ticket sold was $6 and each student ticket was $4.50 and 260 tickets were sold fo
    5·1 answer
  • I need your help guys !!!!!!!!
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!