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3 years ago

Steve washed 15 cars in 3 hours.how many cars can he wash in 7 hours?

1 answer:

3 0

35 Cars because, if you times 3 by 5 it equals 15 which means that 1 hour equals 5 cars. So you times 7 by 5 and that will give you the amount of cars that were washed.

You might be interested in

Consider the probability that greater than 90 out of 149 software users will not call technical support. Assume the probability

Artemon [7]

Answer:

0.1220

Step-by-step explanation:

You want the probability that greater than 90 out of 149 software users will not call tech support, given that the probability a given user will not call is 56%. You want the value using the normal approximation to the binomial distribution.

<h3>Normal approximation</h3>

For a sample size of n, and probability p of "success", the normal approximation to the binomial distribution can be used if ...

min(pn, (1-p)n) > 5

Here, that is ...

min(0.56·149, 0.44·149) > 5

65.6 > 5 . . . . . . . . true, the normal approximation is appropriate

Then the parameters of the normal distribution are ...

µ = pn = 0.56·149 = 83.44

σ = √((1-p)µ) = √(0.44·83.44) ≈ 6.0592

<h3>Continuity correction factor</h3>

The probability that X = N will occur can be considered to be ...

P(N -0.5 < X < N +0.5)

Then the probability that X > N will be modeled using the normal distribution as ...

P(X > N +0.5)

For this problem, we want ...

P(X > 90.5) . . . . using the normal distribution with µ = 83.44, σ = 6.0592

The attached calculator shows that value to be ...

P(>90) ≈ 0.1220 . . . . . . rounded to 4 decimal places

<em>Additional comment</em>

A probability calculator says the actual binomial distribution result for this problem is 0.1217.

7 0

1 year ago

If 1=36, 2=38, 3=39, what does 4 equal to? kindly explain

timama [110]

Answer: 4=40 ! Its a pattern

8 0

3 years ago

Read 2 more answers

Sofia and her mother decided to start a tomato garden they went to the store and purchase 48 tomato plants Sophia wanted to have

Hunter-Best [27]

Answer:

6 rows

Step-by-step explanation:

Total plants ÷ tomatoes in each row = # of rows.

48÷8=6

6 rows.

5 0

3 years ago

Calculate the mode of the data set below. {3, 7, 9, 2, 5, 3, 4, 6, 1, 0} A. 3 B. 3.5 C. 4 D. 10

Shkiper50 [21]

The mode is the number that appears most often. The answer is A.3.

3 0

3 years ago

Read 2 more answers

What is the better deal? Deal#1. Is a 20% discount followed by a second discount of 15%. Deal#2. Is one 35% discount

Nat2105 [25]

Deal 1 is the better deal because if it was $100, then 1 would be $60 and 2 would be $65.

6 0

3 years ago