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Maksim231197 [3]
3 years ago
12

Twenty percent of all undergraduates at a university are chemistry majors. In a random sample of six ​students, find the probabi

lity that exactly four are chemistry majors.
Mathematics
1 answer:
tamaranim1 [39]3 years ago
6 0
The probability that 4 are chem majors would be 5%
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Change 0.384 to a percent.<br> 384%<br> 3.84%<br> 38.4%<br> 38.4
anygoal [31]
Move over 2 decimal places
This would be 38.4%
8 0
2 years ago
The net of a rectangular prism is shown below.
Mamont248 [21]

Answer:

28

Step-by-step explanation:

Using a net to find the surface area of a rectangular prism

Finding the areas of each of the rectangles and squares of the net of a rectangular prism and adding up those areas gives the surface area or total surface area of the prism.

For example, if the length of one side of the cube 4 units then the area of one its face is 4 × 4 = 16 square units. From the net, we can see that there are six equal faces and so we get the total surface area is 6 × 16 = 96 square units.

Surface Area of a Rectangular Prism using Nets

A rectangular prism or cuboid is formed by folding a net as shown −

Cuboid

We can see from the net that there are two rectangles with dimensions 3 cm by 6 cm, two rectangles with dimensions 2 cm by 6 cm and two rectangles with dimensions 2 cm by 3 cm. The total surface area is then

2 × 3 × 6 + 2 × 2 × 6 + 2 × 2 × 3 = 72 cm2

Example 1:

Find the surface area of the given rectangular prism in square cm.

Rectangular Prism in Square cm

Solution

Step 1:

Using net, the surface area of a rectangular prism

= 2lw+wh+lh; l = 6 ; w = 5; h = 3

Step 2:

Surface area of given prism = 26×5+6×3+3×5

= 230+18+15

= 126 square cm

Example 2:

Find the surface area of the given rectangular prism in square cm.

Rectangular Prism Square cm

Solution

Step 1:

Using net, the surface area of a rectangular prism

= 2lw+wh+lh; l = 5; w = 6; h = 4

Step 2:

Surface area of given prism = 25×6+5×4+6×4

= 230+20+24

= 148 square cm

6 0
2 years ago
Read 2 more answers
7(n+4) ....................
Juli2301 [7.4K]

Answer:

<h2>7n + 28</h2>

Step-by-step explanation:

7(n + 4)

Expand

7 \times n = 7n \\ 7 \times 4 = 28 \\  \\ 7n + 28

4 0
2 years ago
Combine the following expressions<br> 2√18x^3 - 3√8x^3<br><br> A. -√x<br> B. 0<br> C.√x
rosijanka [135]

This is what I have but it doesn't match with your answers

8 0
2 years ago
Solve for x in the diagram below.
larisa [96]

Answer:

x = 20

Step-by-step explanation:

The three angles form a straight line so they add to 180 degrees

x+ 100 +3x = 180

Combine like terms

100+4x= 180

Subtract 100 from each side

100+4x-100= 180-100

4x= 80

Divide each side by 4

4x/4 = 80/4

x = 20

8 0
2 years ago
Read 2 more answers
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