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tatiyna
3 years ago
14

A factory makes car batteries. The probability that a battery is defective is 1/4. If 400 batteries are tested, about how many a

re expected to be defective?
Mathematics
1 answer:
notka56 [123]3 years ago
8 0

Answer:

100 batteries would be defective

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Please help me with this question
Goryan [66]
The correct answer to this is D
8 0
3 years ago
what is the common ratio of the geometric sequence below? –96, 48, –24, 12, –6, ... a, -2 b,-1/2 c, 2 d, 1/2
marysya [2.9K]

Answer:

Option b is correct.

The common ratio for the given geometric sequence is; \frac{-1}{2}

Step-by-step explanation:

The given sequence is;  -96, 48 , -24, 12 , -6, .....

Since, given sequence is Geometric

Geometric Sequence in which each term is found by multiplying the previous term by a constant(i.e common ratio)

In general we write geometric sequence as;

a , ar, ar^2, ar^3 , .....

where a be the first term and r is the common ratio.

On comparing the given sequence with general geometric sequence;

we get

a = -96                  ......[1]

ar = 48                   ......[2]

ar^2 = -24              .....[3]

and so on....        

To find the common ratio i.e, r;

Divide equation [2] by [1];

\frac{ar}{a} =\frac{48}{-96}

Simplify:

r = \frac{-1}{2}

Similarly,

by dividing the equation [3] by [2] we get;

\frac{ar^2}{ar} = \frac{-24}{48}

Simplify:

r = \frac{-1}{2}

As, you can see that the value of r is constant i.e, r= \frac{-1}{2} in the given sequence.

Therefore, the common ratio for the given geometric sequence is; r= \frac{-1}{2}


8 0
3 years ago
Read 2 more answers
3.If x=3, what is the value of 3?​
algol13

Answer:

is it proper question I am sorry I canot understand

8 0
2 years ago
Which of these is a lower price than 6 f for 9$
Gnesinka [82]

Answer:

Step-by-step explanation:

well i don't know what this means because it says which so that means there has to be a multiply choice. so i cant really help with that

7 0
3 years ago
I NEED THE ANSWER IN THE NEXT MINUTE
OverLord2011 [107]

Answer:

508.68

*sorry if this is late

Step-by-step explanation:

Divide 36 by 2 to get radius

Multiply 18 by itself to get 324

Multiply 324 by 3.14 to get the area of a circle

Divide it by 2 to get the area of the semi circle

7 0
3 years ago
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