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3 years ago

PLEASE HELP!! 20 POINTS PLUS BRAINLIEST IF YOURE RIGHT!!

1 answer:

8 0

Firstly, we have to find the mean. The mean is simply the average of the numbers, which we find by adding each number in the sequence and then dividing that result by the total amount of numbers.

13.3 + 14.3 + 15.3 + 16.3 + 17.3 = 76.5

76.5 / 5 = 15.3

Okay, so our average is 15.3.

Now, we have to subtract the mean from each number and then square the result.

(13.3 - 15.3)^2 = 4
(14.3 - 15.3)^2 = 1
(15.3 - 15.3)^2 = 0
(16.3 - 15.3)^2 = 1
(17.3 - 15.3)^2 = 4

Now we have to find the mean of those numbers!

4 + 1 + 0 + 1 + 4 = 10

10 / 2 = 2

Finally, we take the square root of that number and we have our standard deviation. =)

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Find the diameter of a cone that has a volume of 104.67 cubic inches and a height of 4 inches. Use 3.14 for pi.

Lady bird [3.3K]

Answer:

Step-by-step explanation:

The volume of a cone is

$V=\frac{1}{3}\pi r^2h$

Filling in what we have:

$104.67=\frac{1}{3}(3.14)r^2(4)$ and simplifying a bit:

$104.67=\frac{1}{3}(12.56)r^2$

Multiply both sides by 3 to get:

$314.01=12.56r^2$

Divide both sides by 12.56 to get:

$25.00079618=r^2$ and take the square root of both sides to find the radius:

r = 5

If the radius is 5 and the radius by definition is half the diameter, then the diameter is 10 inches.

7 0

3 years ago

EVALUATE THE FUNCTION: g(8) Let g(x) = x2 + 4x − 1.

Alja [10]

1. Let g(x) = x2 ... d. f(4). 74. 4. 34. 3. Let g(x) = x2 + 4x - 1. Find the following: a. g(-4) b. g(8) c. g(-1) d. g(1).

8 0

3 years ago

4×____×1=12 ?=____. please help me solve this question

Triss [41]

Answer:

4 x 3 x 1 = 12

12 = 12

Step-by-step explanation:

I used a calculator, pls let me know if im incorrect

8 0

3 years ago

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

USPshnik [31]

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:

8 0

3 years ago

central angle of a sector is 72° and the sector has an area of 16.2(pie) ft^2. what is the radius of the circle?

Cloud [144]

Sector area = (central angle / 360) * PI * radius^2
sector area = (72 / 360) * PI * radius^2
radius^2 = sector area / [(72 / 360) * PI]
radius^2 = 16.2 * PI / [(1 / 5) * PI]
radius^2 = 16.2 / .2
radius^2 = 81
radius = 9

Source:
http://www.1728.org/radians.htm

6 0

4 years ago