B

Mathematics

1 answer:

Viktor [21]3 years ago

8 0

Answer:

A. $18

Step-by-step explanation:

Assuming that Reed buys coffee every morning, you can use the equation 3*6 to solve.

You would multiply 3 and 6 because everyday Reed spends $3 on coffee for 6 days. You could also think of it as adding 3+3+3+3+3+3 which would equal to 18.

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Snoopy the dog is on a 25-ft long chain that is attached to the back of a barn (see the

NeTakaya

Answer:

A = 981.3 ft^2

Step-by-step explanation:

Here we're calculating the area of a semicircle of radius 25 ft.

The area of a circle is A = (pi)(r)^2, and that of a semicircle of the same radius is A = (1/2)(pi)(r)^2.

Here pi = 3.14 and r = 25 ft, and so the area/space in question is

A = (1/2)(3.14)(25)^2

A = 981.3 ft^2

5 0

3 years ago

The daily intakes of milk (in ounces) for ten randomly selected people were: 26.0 13.0 13.5 14.8 19.1 13.6 21.6 30.8 15.8 14.1 f

kakasveta [241]

Re-arranging the numbers;
13.0, 13.5, 13.6, 14.1, 14.8, 15.8, 19.1, 21.6, 26.0, 30.8

Mean, x_bar = (13.0+13.5+13.6+14.1+14.8+15.8+19.1+21.6+26.0+30.8)/10 = 18.23

Standard deviation, sigma = Sqrt [{(13-18.23)^2+(13.5-18.23)^2+(13.6-18.23)^2+(14.1-18.23)^2+(14.8-18.23)^2+(15.8-18.23)^2+(19.1-18.23)^2+(21.6-18.23)^2+(26-18.23)^2+(30.8-18.23)^2}/10] = Sqrt [{27.3529+22.3729+21.4369+17.0569+11.7649+5.9049+0.7569+11.3569+60.3729+158.0049}/10] = Sqrt [336.381/10] = 5.8

Therefore,
x_bar = 18.23
sigma = 5.8
At 99% confidence, Z = 2.58

Confidence interval = x_bar +/- Z*sigma/Sqrt (n) = 18.23+/- 2.58*5.8/Sqrt (10) = 18.23+/-4.73 = [(18.23-4.73), (18.23+4.73)] = [13.5,22.96]

4 0

3 years ago

Two children are sharing 1/2 of a sandwich. how much will each child get

11Alexandr11 [23.1K]

Each child will get 1/4 of the sandwich.

(1/2)/2 = 1/4

6 0

3 years ago

Jenelle invested $13000 in two mutual funds. Fund A earned 5% profit during the first year, while Fund B suffered a 2.5% loss. I

nexus9112 [7]

Answer:

hola la respuesta es 3900 y 2348