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marissa [1.9K]
3 years ago
12

I really need help ................................................​

Mathematics
1 answer:
Helga [31]3 years ago
7 0
When is this homework due?
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In order to determine an interval for the mean of a population with unknown standard deviation a sample of 61 items is selected.
Phoenix [80]

Answer:

c. 60

Step-by-step explanation:

Given

n = 61 --- sample

\bar x = 23

Required

Determine the degrees of freedom (df)

This is calculated as:

df = n - 1

df = 61 - 1

df = 60

8 0
3 years ago
A cylindrical water towers has a diameter of 15 meters and a height of 5 meters. About how many gallons of water can the gallon
Artemon [7]

Answer:

233445.54 gallons

Step-by-step explanation:

Given data

Diameter= 15m

Radius= 7.5m

Height= 5m

Let us first find the volume

the volume of a cylinder is given as

V= πr^2h

substitute

V= 3.142*7.5^2*5

V= 3.142*56.25*5

V=883.6875 m^3

Hence the volume in gallons is

233445.54 gallons  (from conversion tables)

7 0
3 years ago
Last spring, Bob built a rectangular pen for his pigs that measured 6 feet long and 4.5 feet wide. He wants to enlarge the pig p
Feliz [49]
A= h•w

6+2 = 8 feet long
4.5+1.5= 6 feet wide

8*6= 48 ft

Answer: 48 feet
3 0
3 years ago
Read 2 more answers
benny uses 2/5 grams (G) of toothpaste each time he brushes his teeth. If benny buys 30-g tube, how many times will be able to b
worty [1.4K]

Answer:

75

Step-by-step explanation:

First divide 2/5 to get 0.4. Then divide 30 by 0.4 to get the answer. A simple way to think about it is how many 0.4 grams are in 30 gram tube.

5 0
3 years ago
−2&gt;m/6−7<br><br>can you please show your work<br><br>Thx!!
Aleksandr [31]
I do believe the answer is m<30
4 0
3 years ago
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