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Liula [17]
3 years ago
8

an average 20% of the Calculators produced in a factory are faulty. Samples of 10 calculators are to be selected at random each

day. Each calculator will be selected and replaced in the set of calculators which have been produced on that day. Calculate the probability that in any one sample two calculators or less will be faulty, (4marks) ​
Mathematics
1 answer:
Ainat [17]3 years ago
5 0
It would be .2 i’m pretty sure because you move the decimal
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Find the length of BC
Ivan

Answer:

13.3650978628

Step-by-step explanation:

Angle A=180-(Angle B+C)=180-117=63

Here,

b=BC, p=AC & AB=12

Using the relation of cos,

cosx=b/h

cos27=BC/15

15cos27=BC

Using a calculator,

BC=13.3650978628

6 0
2 years ago
AXY Zand AABCare similar triangles. Given the dimensions shown in the diagram, what is the
Lady bird [3.3K]

Answer:

3.528

Step-by-step explanation:

First, you need to determine the scale factor. Divide one side in the larger triangle by the corresponding side in the smaller triangle. For example, 8/2. This would give you a scale factor of 2. Then you can reverse the process with the dimensions you need to get the area. The height of the larger triangle is 3.36, so to find the height of the smaller one, you divide it by 2, or the scale factor, to get the height of the smaller triangle which is 1.68. Next, you can solve for area of triangle using a=bh/2, so 4.2*1.68/2=a = 3.528.

6 0
3 years ago
This is gonna be the death of me
kykrilka [37]
Hey!
So you have a net of the figure. It's broken into several 2D shapes. What you an do it find the area of each shape and add it together.
Triangles: 
A = (b*h)/2
A= (5 * 3) / 2
A = 15/2
same thing for the second one
15/2 * 2 = 15
Don't forget, there are 2 triangles so it's really 15 for both

Rectangles:
A=b*h
A= 7*5
A=35

A=7*5
A=35

A=3*7
A=21

35+35+21=91

Now add the sum of the area of the triangles and the sum of the area of the rectangles

91+15 = 106

106 is the surface area
Hope this helps!
5 0
3 years ago
Find s in the parallelogram
adell [148]

Answer:

Step-by-step explanation:

DE=DG

8s-97=3s-22

5s-97=-22

5s=75

s=15

8 0
3 years ago
the legs of a scalene triangle are represented by (x+4),(x+8), and (2x - 3) which polynomial expression best represents the peri
AVprozaik [17]

perimeter means add the side

(x+4) +( x+8)+(2x-3) =P

x+x+2x+4+8-3=P

4x-9 =P

8 0
3 years ago
Read 2 more answers
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