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3 years ago

Natalie did 87 sit-ups in 3 minutes.

Mathematics

1 answer:

pishuonlain [190]3 years ago

7 0

Answer:

19 sit-ups per minute ;

95 sit-ups

Step-by-step explanation:

Given that :

Number of sit-ups done in 3 minutes = 57

The unit rate of sit-ups done can be obtained thus :

Total Number of sit-ups done / total time taken

= 57 sit-ups /3 minutes

= 19 sit-ups per minute

. Number of sit-ups that can be done in 5 minutes :

Unit Rate of sit-ups * number of minutes

19 sit-ups / minute * 5 minutes

= 95 (sit-ups / minute * minute)

= 95 sit-ups

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provide an appropriate response. the length of time it takes college students to find a parking spot in the library parking lot

Vladimir79 [104]

By the distribution,6.3 minutes is the time limit that 75.8% of college students go over when looking for a parking space in the library parking lot.

Given that,

Finding a parking spot in the library parking lot takes college students an average of 7.0 minutes, with a standard deviation of 1 minute, according to a normal distribution.

Find the window of opportunity that 75.8% of college students miss when looking for a place in the library parking lot.

The following formula calculates the z-score of a measure X of a normally distributed variable with mean μ and standard deviationσ:

Z=(X-μ)/σ

The z-score calculates how far the measure deviates from the mean by standard deviation.

The p-value for this z-score, which is the percentile of X, can be obtained by looking at the z-score table.

The cut-off time is the 100th percentile minus 75.8th percentile, or X, for Z = -0.7, so:

Z=(X-μ)/σ

-0.7=(X-7)/1

-0.7=X-7

X=-0.7+7

X=6.3

Therefore, 6.3 minutes is the time limit that 75.8% of college students go over when looking for a parking space in the library parking lot.

To learn more about standard deviation visit: brainly.com/question/16555520

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6 0

1 year ago

What is the sum of the integers between the square root of 12 and 40?

satela [25.4K]

1.

the closest perfect squares of 12 are 9 and 16,

that is 9<12<16

so
$\sqrt{9}\ \textless \ \sqrt{12}\ \textless \ \sqrt{16}$

$3\ \textless \ \sqrt{12}\ \textless 4$

this means, $\sqrt{12}$ is 3 point something...

2.

similarly

36<40<49

so

$\sqrt{36}\ \textless \ \sqrt{40}\ \textless \ \sqrt{49}$

$6\ \textless \ \sqrt{40}\ \textless \ 7$

which means $\sqrt{40}$ is 6 point something...

3.

<span>the sum of the integers between the square root of 12 and 40 is the sum of 4, 5 and 6, since 4 is the smallest integer after root 12, and 6 the greatest integer to before root of 40.

Answer: 15</span>

8 0

3 years ago

0.66x10 to the 3rd power

Bas_tet [7]

The answer to this is 660

4 0

2 years ago

Read 2 more answers

15. USE EFFICIENT METHODS Without

-Dominant- [34]

Answer:

$5^-7, 5^0, 5^4$

Step-by-step explanation:

Any time a number has a negative exponent that means that the resulting number will be a fraction (ex. $2^-2=\frac{1}{4}$ ). Therefore this number is the smallest number.

Anytime a number has an exponent of 0, it will always equal 1

8 0

2 years ago

Solve for Unknown: x/10=43/46.

sergey [27]

Answer:

Step-by-step explanation:

x= 430/46

x=9.35 approximately 9( nearest whole number)

4 0

2 years ago