2 years ago

Are all these answers correct? Samples and population in mathematics. Please help I really need it.

Mathematics

1 answer:

k0ka [10]2 years ago

5 0

It looks right to me.

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Find the volume of a cylinder with a diameter of 8 inches and a height that is three times the radius. Use 3.14 for pi and round

ivann1987 [24]

Step 1: Find the area of the base: pi(r^2)=3.14(8^2)=200.96
Step 2: Multiply area by height. Height= 3(8)=24
Volume= 24*200.96=4823.04 inches

Hope this helps!

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3 years ago

A cone has volume 12 cubic inches. Its height is 4 inches. What is its radius?

Gekata [30.6K]

the radius of this cone is 2.9

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1 year ago

Read 2 more answers

X + y = 152, 8.5x + 12y = 1,656 How many hats were sold?

Elodia [21]

Answer:

x = 48 and y = 104

Step-by-step explanation:

Given equations are:

$x+y = 152\\8.5x+12y=1656$

From equation 1:

$x = 152-y$

Putting the value of y in equation 2

$8.5(152-y)+12y = 1656\\1292-8.5y+12y = 1656\\3.5y+1292 = 1656\\3.5y = 1656-1292\\3.5y = 364\\\frac{3.5y}{3.5} = \frac{364}{3.5}\\y = 104$

Now we have to put the value of y in one of the equation to find the value of x

Putting y = 104 in the first equation

$x+y = 152\\x+ 104 = 152\\x = 152-104\\x = 48$

Hence,

The solution of the system of equations is x = 48 and y = 104

The value of variable which was assumed for number of hats, is the total number of hats.

6 0

2 years ago

Sylvie is going on vacation. She has already driven 58 miles in one hour. If she then travels for 6 hours at an average speed of

Vlada [557]

The answer would be 360 miles

8 0

2 years ago

What is the domain and range of the set? {(2,2.3),(5,2.3), (7,15)}

aleksandrvk [35]

Answer:

DOMAIN: 2, 5, 7

RANGE: 2.3, 2.3, 15

Step-by-step explanation:

Domain is always the first value of the set, and range is always the second value of the set. Hope it makes sense, and that it helped.

Have a good day! goodluck.

3 0

2 years ago