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quester [9]
2 years ago
11

The track team had 50 girls on the team last year. This year the team had 35 girls. What is the percent of decrease of the numbe

r of girls on the team from last year to this year?
Mathematics
1 answer:
zheka24 [161]2 years ago
5 0

Answer:

30%

Step-by-step explanation:

(50 - 35)/50 x 100 = (15/50) x 100 = 30%

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Let us compute first the probability of ending up an odd number when rolling a dice. A dice has faces with numbers 1 up to 6. The odd numbers within that is 3 (1, 3 and 5). Therefore, each dice has a probability of 3/6 or 1/2. Then, you use the repeated trials formula:

Probability = n!/r!(n-r)! * p^r * q^(n-r), where n is the number of tries (n=6), r is the number tries where you get an even number (r=0), p is the probability of having an even face and q is the probability of having an odd face.

Probability = 6!/0!(6!) * (1/2)^0 * (1/2)^6
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Therefore, the probability is 1/64 or 1.56%.
6 0
3 years ago
In a survey, 600 adults in a certain country were asked how many hours they worked in the
Snowcat [4.5K]

Answer:

C. Correct

Step-by-step explanation:

The interpretation of a confidence interval of x% is that we are x% that this interval contains the mean of the population.

So, for example, the interpretation of a confidence interval of 95% is that we are 95% that this interval contains the mean of the population.

In this problem, we have that:

Based on the results, a 95% confidence interval for mean number of hours worked was lower bound: 41.5 and upper bound: 45.6.

Also, the following affiration:

(A) There is a 95% chance the mean number of hours worked by adults in this country in the previous week was between 41.5 hours and 45.6 hours.

This is correct

So, the answer is:

C. Correct

5 0
3 years ago
A centipede is crawling 6 inches per minute. how long will it take the centipede to travel 1 yard?
Ede4ka [16]
6 minutes, because 1 yd is equivalent to 3 feet, which is equivalent to 36 inches.  If a centipede crawls at 6 inches per minute, you do 6 x 6, which equals 36, and get 6 minutes!
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2x=3y+1/2 I have to write this in standard form and slope intercept form
Sav [38]

Answer:

Step-by-step explanation:

2x = 3y + 1/2

standard : Ax + By = C

2x = 3y + 1/2....multiply everything by 2 to get rid of the fractions

4x = 6y + 1 ....subtract 6y from both sides

4x - 6y = 1 <==

slope intercept : y = mx + b

2x = 3y + 1/2....subtract 1/2 from both sides

2x - 1/2 = 3y....divide everything by 3

2/3x - 1/6 = y...rearrange

y = 2/3x - 1/6 <===

8 0
3 years ago
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