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Inessa05 [86]
4 years ago
8

Help please~

Mathematics
2 answers:
Stels [109]4 years ago
6 0
The answer is 2670.57 and yes im sure this is right i just finished my quiz! (Please make the answer the brainliest!)
Gnesinka [82]4 years ago
5 0

Answer:

2670.57 cm³

Step-by-step explanation:

The volume of a sphere is given by the formula

V = 4/3πr³

The diameter of the entire spherical object is 18 cm.  This makes the radius 18/2 = 9 cm.

This gives us the volume

V = 4/3(3.14)(9³) = 3052.08 cm³

The diameter of the core is 9 cm.  This makes the radius 9/2 = 4.5 cm.

This gives us the volume

V = 4/3(3.14)(4.5³) = 381.51 cm³

This makes the volume of the outer layer

3052.08-381.51 = 2670.57 cm³

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shusha [124]
The base length of a window is the length of its bottom. The area of a window is A = bh where b is the base and h is the height. So the area of the glass needed is bh or 5h. The answer is 5h.
7 0
3 years ago
A sample of students was asked what political party do they belong. which of the following types of graphical display would be a
inna [77]

Answer:

B. Pie chart.

Step-by-step explanation:

In this question, the students are asked what political party they belong. The best display format would be one in which the graph can be divided into parts, or percents, according to the percentage of students belonging to each political party. The graph that best describes this, distributing a group into parts, is a pie chart, and thus, the correct answer is given by option b.

Scatterplot is used when two variables correlate together, that is, there is a relationship between them, which we don't have between the number, or proportion of students belonging to each political party. Stemplot are used when there is a high number of quantitative data, which we do not have here.

5 0
3 years ago
A family charges a trip to the zoo on a credit card. The simple interest rate is 12%. The charges are paid after 3 months. What
vodomira [7]
The formula for simple interest is: A = P(1 + rt)
R=12
We are going to convert the percent (12) into a decimal.
r = R/100 = 12/100 = 0.12
Then, we are going to put the months into years.
3 / 12  = 0.25
Let's plug in the values:
A = 175.54(1 + (0.12 * 0.25)) = 180.8062
A = 180.81
The total amount paid for the trip is $180.81

Have a nice day! :)
5 0
3 years ago
Do you guys know What’s (4x) (-2)
Bess [88]

Answer: -8x

Step-by-step explanation: to get the answer you would multiply 4x and -2.

4x*-2= -8x

4 0
3 years ago
Read 2 more answers
Find the area of the polygon
Rom4ik [11]

Answer:

Step-by-step explanation:

So the area of a cube is a²

This means that:

2² = 4cm²

So the area of a triangle is (b*h)/2

This means that:

(3*2)/2 =

6/2 = 3cm²

4cm² + 3cm² = 7cm²

Overall area is 7cm².

4 0
3 years ago
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