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Otrada [13]
2 years ago
12

A piece of work can be finished in 8 days, what part of the work is done in 2 days​

Mathematics
1 answer:
WINSTONCH [101]2 years ago
7 0

Answer:

1/4 of the work

Step-by-step explanation:

A quarter (1/4) of the work is done in 2 days. Let's break it down:

Work can be finished in 8 days total so with 2 days it is only partially completed. If we set it up as 2/8 we can simplify to get 1/4. Therefore, we know only a quarter of the work is done so far.

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25% of all who enters a race do not complete. 30 haveentered.
nikklg [1K]

Answer:

The probability that exactly 5 are unable to complete the  race is 0.1047

Step-by-step explanation:

We are given that 25% of all who enters a race do not complete.

30 have entered.

what is the probability that exactly 5 are unable to complete the  race?

So, We will use binomial

Formula : P(X=r) =^nC_r p^r q^{n-r}

p is the probability of success i.e. 25% = 0.25

q is the probability of failure =  1- p  = 1-0.25 = 0.75

We are supposed to find the probability that exactly 5 are unable to complete the  race

n = 30

r = 5

P(X=5) =^{30}C_5 (0.25)^5 (0.75)^{30-5}

P(X=5) =\frac{30!}{5!(30-5)!} \times(0.25)^5 (0.75)^{30-5}

P(X=5) =0.1047

Hence the probability that exactly 5 are unable to complete the  race is 0.1047

6 0
3 years ago
Please explain your answer
Irina18 [472]
\text{Distance = } \sqrt{(5 + 8)^2+ (-3 + 3)^2 }=   \sqrt{13^2} = 13

Answer: 13 units
6 0
3 years ago
A digital gaming service offers a subscription plan with a $25 membership fee and charges a $2.50 per game rental fee. How many
erastova [34]

Answer:

They can get at most 10 games

The inequality is g=25+2.50x

Step-by-step explanation:

50=25+2.5x

50-25=25

25=2.5x

25/2.5=10

6 0
3 years ago
What is the equivalent mixed number to 23/4
lora16 [44]
5 3/4
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4 0
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5 chaperones are needed for the trip
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