Are anesthetics safe? The National Halothane Study was a major investigation of the safety of anesthetics used in surgery. Records of over 850,000 operations performed in 34 major hospitals showed the following death rates for four common anesthetics:
Anesthetic A B C D
Death 1.7% 1.7% 3.4% 1.9%
There seems to be a dear association between the anesthetic used and the death rate of patients. Anesthetic C appears to be dangerous.
A) Select the best explanation for why we call the National Halothane Study an observational study rather than an experiment, even though it compared the results of using different anesthetics in actual surgery.
B) When the study looked at other variables that are confounded with a doctor's choice of anesthetic, it found that Anesthetic C was not causing extra deaths. Suggest several variables that are mixed up with what anesthetic a patient receives.

Answer:

Shift of graph of y=x^2 up 9 units.

Option D is correct option.

Step-by-step explanation:

We are given:

[tex]y = x^2[/tex]

We need to describe how the graph of [tex]y = x^2[/tex] can be transformed to the graph of the given equation [tex]y=x^2+9[/tex]

We know the transformation rule:

If f(x) is transformed into f(x)+h, the graph is transformed vertically up h units.

So, In our case:

[tex]y=x^2[/tex] is transformed into [tex]y=x^2+9[/tex]

So, The graph is transformed vertically up 9 units.

Or we can write, shift of graph of y=x^2 up 9 units.

Option D is correct option.

Answer:

False

Step-by-step explanation:

Answer:

$110

Step-by-step explanation:

If 110% = $103 + $18

110% = $ 121

Then 100% = ?

(100 ÷ 110) × 121 = $110

Amount Stefan spent = $103 + 18

= $121

Amount Jin made = $121 - 110

= $11

Answer:

(C) y = x/2 + 2

Answer:

28+49

Step-by-step explanation:

Answer:

x=7

Step-by-step explanation:

9514 1404 393

Answer:

  1.37; see attached

Step-by-step explanation:

The steps of long division are shown in the first attachment.

My favorite way to do arithmetic of this sort is shown in the second attachment. (That is, use a calculator.)

Answer:1 : 22.5

2 : 20 games

3 : 575

4 : Grant can purchase 7 base ball cards packs in $21

Step-by-step explanation: OK first divide 90 by 4 to see how many words per minute

1# 90 ÷ 4 = 22.5

OK, then multiply 22.5 by 10 for your answer

Your answer is;

225 words per 10 minutes

2#Hope I Helped!!! 7*4=28 and 5*4=20 so about 20 games.

3# 2p=230

divide 2

Each slice of pizza is 115 calories.

5p=c

5(115)=c

575= Calories

Grant paid $12 for 4 baseball card packs.

So, in $1 he will purchase, cards

And in $21, he will purchase = 7

Therefore, Grant can purchase 7 base ball cards packs in $21.

Answer:

-37

Step-by-step explanation:

Simplifying

74 + 2x = 0

Solving

74 + 2x = 0

Move all terms containing x to the left, all other terms to the right.

Add '-74' to each side of the equation.

74 + -74 + 2x = 0 + -74

Combine like terms: 74 + -74 = 0

0 + 2x = 0 + -74

2x = 0 + -74

Combine like terms: 0 + -74 = -74

2x = -74

Divide each side by '2'.

x = -37

Simplifying

x = -37

Answer:

B.) |w - 5.76| / 36 = 0.03

Step-by-step explanation:

Given :

Weight of individual candy piece = 0.16 ounce

Number of candy pieces per package = 36

Allowable variation in weight of individual piece = 0.03 ounces

The highest and lowest allowable weight, w of a package of 36 pieces ;

Actual manufacturing weight of entire 36 candy = (36 * 0.16) = 5.76

Allowable weight ± actual weight ≤ allowable variation

w ± 0.16 ≤ 0.03

|w - 0.16| ≤ 0.03

For the entire 36 candy pieces :

|w - 0.16*36| = 0.03 * 36

|w - 5.76| = 1.08

|w - 0.16*36| = 0.03 * 36

Could also be written as :

|w - 5.76| / 36 = 0.03

Answer:

The sequence is a function

Step-by-step explanation:

Given

Sequence: [tex]A_0=100[/tex]; [tex]A_n=A_{n-1}+75[/tex]

Required

Is the sequence a function

To determine if the sequence is a function or not, we start by calculating its range from the domain:

When n = 0; [tex]A_0=100[/tex]

When n = 1: [tex]A_1 = A_{1-1} + 75 = A_0 + 75 = 100 + 75 = 175[/tex]

When n = 2; [tex]A_2 = A_{2-1} + 75 = A_1 + 75 = 175 + 75 = 250[/tex]

When n = 3; [tex]A_3 = A_{3-1} + 75 = A_2 + 75 = 250 + 75 = 325[/tex]

This implies that:

The domain (n) and the range (An) can be represented as:

[tex]\left[\begin{array}{c}n&-&0&1&2&3\\-&-&-&\end{array}\right][/tex]                       [tex]\left[\begin{array}{c}A_n&-&100&175&250&325\\-&-&-&\end{array}\right][/tex]

The above shows that the sequence is a one to one relation and a one to one relation is always a function.

Answer:

Yes, because for each input value, n, there is only one possible output value.

Step-by-step explanation:

9514 1404 393

Answer:

Step-by-step explanation:

In each group of 5 coins, 4 are nickels and 1 is a dime. There are 65/5 = 13 such groups, so 13 dimes, and 4×13 = 52 nickels.

Answer:

Algebracicaly speaking the answer would be either -13.3876 or - 158.612 through the quadratic equation, but these answers don’t make sense in this real world scenario.

Step-by-step explanation:

Answer: 5 is your answer

Step-by-step explanation:

Answer:

Step-by-step explanation:

3x - 5y = 2

3x = 2+5y

x = (2+5y)/3

-5y = 2-3x

5y = -2+3x

y = (-2+3x)/5

HOPE THIS HELPS YOU

Answer:

holy that sucks for you like wow

Answer:

WHAT IS THAT

Step-by-step explanation:

IT LOOKS LIKE THIS :

HSIOALXVBHSOQPSBSHIAOSKXX

Answer:

given a linear function represented by a table of values and a linear function ... Students may have trouble with the word unique. ... How do you determine if relations are functions? ... How can you use functions to model real-world situations? ... said while there was input and output, she thought the machine was more like a.

Step-by-step explanation:

Answer:

i got into B or C

Step-by-step explanation:

Answer:

Rigged

Step-by-step explanation:

The 9th grade system is rigged.

Answer:

may be this helpful!

0.4 as a whole number would 1

The number 4 cannot be rounded down to 0 because 0 is not bigger or the same as 0. 4

Instead, the number 0. 4 would be rounded up to 1, which is the closest whole number.

A whole number is a positive number that doesn't have any parts with decimals or fractions. Whole numbers are numbers that start from 0 and go up without any fractions or negative numbers. In simpler terms, whole numbers include the numbers 0, 1, 2, 3, 4, 5, and so on. They only have positive numbers and whole numbers.

Learn more about whole no

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Answer:

6.25

Step-by-step explanation:

Answer:

60 because [total of pizzas]/(veggie + cheese)= 12 ((108/(4+5) = 12)) so you take 5 (the amount of cheese pizzas) and multiply it by 12 to get 60

sorry if i explained it bad im not too good at explaining

Answer:

im taking s nap

Step-by-step explanation:

Answer:

I think its 20 minutes

am i right?

Step-by-step explanation:

I am not sure about my ans

but..

it can 800 or more pages

hope it helps you...

Answer:

900pages=45minutes

Step-by-step explanation:

Step 1: Find the unit rate=how many pages he can type in 1 minute

to find the unit rate,

k=y/x

y=400 pages

x=20 min

400/20=20 pages in 1 minute

Step 2: Multiply the amount of pages by 45

k times x = y

20 times 45= 900 pages in 45 minutes

So, it will take the secretary 45 minutes to type 900 pages.

Answer:

The number of lunch specials possible is 8.

Step-by-step explanation:

• If there are 2 sandwiches, 2 drinks, and 2 desserts to choose from and the lunch special is a sandwich, drink, and dessert:

• To find out the answer, we are going to say that we have sandwich a & sandwich b, drink a & drink b, and dessert a & dessert b:

1.) Sandwich a:

2.) Sandwich a:

3.) Sandwich a:

4.) Sandwich a:

5.) Sandwich b:

6.) Sandwich b:

7.) Sandwich b:

8.) Sandwich b:

Please mark me the Brainliest!?!

The number of lunch specials possible is 8.

Combinations are mathematical operations that count the number of potential configurations for a set of elements when the order of the selection is irrelevant. You can choose the components of combos in any order.

If there are 2 sandwiches, 2 drinks, and 2 desserts to choose from and the lunch special is a sandwich, drink, and dessert.

The total choices are 3 in that 2 options for every choice are available.

Thus total combination can be made = 2³

total combination can be made = 8

Therefore, the total number of possible lunch specials is 8.

Learn more about combination here:

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