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Radda [10]
3 years ago
5

Scientists want to estimate the mean weight gain of mice after they have been fed a special diet. From previous studies, it is k

nown that the weight gain is normally distributed with standard deviation 2 grams. How many mice must be weighed so that a 99% confidence interval for population mean weight will have a margin of error of 0.4 grams
Mathematics
1 answer:
USPshnik [31]3 years ago
8 0

Answer:

One example is the equation:

2x + 6 = 4x/2 + 12/2

To solve this, we need to transpose like terms to the same side.

2x - 4x/2 = 12/2 - 6

2x - 2x = 6 - 6

0 = 0

Since both sides are zero, it means that the equation has infinite number of solutions.

Step-by-step explanation:

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An engineer is planning a new water pipe installation. The circular pipe has a diameter of d=20cm.
Komok [63]
We know that
the area A of the circular cross section of the pipe is
A=pi*r²
D=20 cm------------- > r=D/2=20/2=10 cm
then
A=pi*10²=100*pi cm²

the answer is A=100*pi cm²
6 0
3 years ago
What is the angle of rotation of the image?<br> A. 60°<br> B. 90<br> C. 120<br> D. 180
vlada-n [284]

Answer:

C.

Step-by-step explanation:

360/3 = 120

7 0
3 years ago
FIND THE FOLLOWING USING THE GIVEN TRIANGLE...PLEASE HELP ME SUCK AT MATH...SOS!!! ASAP!!!!
SIZIF [17.4K]

perimeter = 20 +20 +24 = 64 feet

 area = 12^2 + x^2 = 20^2

144 + x^2 = 400

x^2 = 256

x = sqrt(256) = 16 feet

area = 1/2 x 16 x 24 = 192 square feet


 cost = 192 x $2 = $384

5 0
3 years ago
What is the distance between (2,6) and (7,6)
PtichkaEL [24]

Answer:

5

Step-by-step explanation:

Finding the distance, midpoint, slope, equation and the x y-intercepts of a line passing between the two points p1 (7,6) and p2 (2,6)

The distance (d) between two points (x1,y1) and (x2,y2) is given by the formula

d= √((X2-X1)2+(Y2-Y1)2)

d = √(2-7)2+(6-6)2

d = √((-5)2+(0)2)

d= √(25+0)

d = √25

The distance between the points is 5

8 0
3 years ago
Read 2 more answers
Which is not a statistical question?
Helga [31]

Answer:

d.

Step-by-step explanation:

A, B, and C ask questions that will be answered with different sets of data.

<u>example a:</u>

purple- 11 students

blue- 5 students

orange- 7 students

<u>example b:</u>

math- 27

history- 30

art- 25

<u>example c:</u>

history books: 12 lbs

math books: 15 lbs

science books: 10 lbs.

If it were to ask how many windows are there in each of the classrooms then it would be statistical.

you get the gist lol.

3 0
3 years ago
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