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leonid [27]
3 years ago
15

A certain rechargeable battery is advertised to recharge up to 99% of its previous capacity with every charge. If its initial ca

pacity is 8 hours of life, how many hours should the battery last?
A. 200
B. 400
C. 600
D. 800
Mathematics
1 answer:
lakkis [162]3 years ago
6 0
The answer of this question is D
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Can someone please help me with this question?
pentagon [3]

z = 4/5

If you take the cube roots of 64 and 125, you get 4 and 5 respectively.

4 0
3 years ago
Two dance teams, the Roses and the Tulips, are perfectly matched so that their chances of winning are both set at 50%. What is t
shtirl [24]

Answer:

6%

Step-by-step explanation:

Step 1

The fist step is to define the probabilities.

The events are independent from each other. Each team wins with probability \frac{1}{2} and looses with probability \frac{1}{2}.  Let P(W_R) be probability that Roses win and P(L_R)  be the probability that Roses loose.

Step 2

The second step is to calculate the probabilities by multiplying the probabilities with the first 3 terms in the product being the probability of a win and the last term being the probability of a loss.

The calculation is shown below,

P(W_R)\times P(W_R)\times P(W_R)\times P(L_R)=\frac{1}{2} \times \frac{1}{2} \times\frac{1}{2} \times\frac{1}{2} =\frac{1}{16}

Step 3

The last step is to convert this probability into a percentage. Converting this probability to a percentage is  done as shown below,

\frac{1}{16} \times 100\%=6.25\%.

Step 4

The next step is to round down the percentage . The value of 6.25% rounded down is 6%. The correct answer is 6%.


3 0
3 years ago
What is the conditional probability that exactly four heads appear when a fair coin is flipped five times
cestrela7 [59]

Answer:

5/32

Step-by-step explanation:

If a coin if flipped five times with four heads, then it has exactly one tail. The number of way to arrange four heads and one tail are as follows:

T H H H H

H T H H H

H H T H H

H H H T H

H H H H T

Essentially, there are five way because there are five "positions" where the tail could be.

Then, you need to find the total amount of possibilities for flipping a coin five times. Every time you flip it, there are two possibilities- heads and tails. Therefore, for five flips, the total amount of possibilities is

2x2x2x2x2 = 32

You know that

probability= # of desired outcome

                   ----------------------------------  

                      # of total outcomes

So the probablity is 5/32.

8 0
3 years ago
What is the answer of |y-2|>8
Sonja [21]

Answer:

y<-6 and y>10

Step-by-step explanation:

5 0
3 years ago
Explain what can happen if you line up the digits incorrectly when you rewrite addition problems
Natali [406]
You will get the incorrect answer because lining up the digits when adding or subtracting is important but it isn’t needed for multiplying.
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3 years ago
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