1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
yanalaym [24]
3 years ago
13

Which two expressions can be used to answer this question? 45% of the 647 students at Royal Oak High attended the football game.

How many students did not attend? A) 647 - 0.45(647); 0.55(647) B) 647 - 0.45(647); 0.45(647) C) 647 + 0.45(647); 0.45(647) D) 647 - 0.55(647); 0.55(647)
Mathematics
2 answers:
Serhud [2]3 years ago
5 0
A. since 45% of 647 is 291.15 and those are the students that attended so subtract that from the total and you get 355.85 or rounded to 355 because you cant have .85 of a person. Plus 100%-45%=55% so .55 of 647 are the ones who didn't attend
steposvetlana [31]3 years ago
3 0

Answer:

A.

Step-by-step explanation:

45% = 0.45 and 55% = 0.55.

To find the number of students who attended to the game we multiply the percentage by the total amount of students: 0.45(647). Then, the number of students who did not attend  is subtract the total and the number of students that attended: 647 - 0.45(647) = 355.

Other way is find the percentage of students who did not attend, that is 100-45 = 55% and with the same process of number of students who attended find the number of students who did not attend: 0.55(647) = 355.

You might be interested in
3/4 of the shirts in a store are black. 50% of the shirts are white and the remaining 12 shirts are red. How many black masks ar
saul85 [17]

Answer:

There are total 96 shirts out of which  72 are black and  12 are white and 12 are red.

Step-by-step explanation:

Let the total number of shirts be x.

Then 3/4= 0.75 shirts are black

50% or 50/100 =0.5  of 1/4 ( 1-3/4) remaining are white

and 12 are red

x= 0.75x+0.125x+12

x= 0.875x+ 12

x-0.875x= 12

0.125x= 12

x= 12/0.125

x= 96

There are total 96 shirts out of which 3/4 are black

96*0.75= 72 are black and

96*0.25= 24  are left behind out of which 50% are white.

12 are white and 12 are red.

4 0
3 years ago
How to simplify (-4)(-4)
DedPeter [7]

Answer:

How to simplify (-4)(-4)

-4×-4=16

5 0
3 years ago
Read 2 more answers
The incubation time for hummingbird eggs is approximately normal and has a mean of 16 days and standard deviation of 2 days. Let
Veseljchak [2.6K]

Answer:

0.5328 = 53.28% probability that the length of hatching times is between 15 and 18 days.

Step-by-step explanation:

Normal Probability Distribution:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the z-score of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.

Mean of 16 days and standard deviation of 2 days.

This means that \mu = 16, \sigma = 2

Probability that the length of hatching times is between 15 and 18 days.

This is the p-value of Z when X = 18 subtracted by the p-value of Z when X = 15. So

X = 18

Z = \frac{X - \mu}{\sigma}

Z = \frac{18 - 16}{2}

Z = 1

Z = 1 has a p-value of 0.8413

X = 15

Z = \frac{X - \mu}{\sigma}

Z = \frac{15 - 16}{2}

Z = -0.5

Z = -0.5 has a p-value of 0.3085

0.8413 - 0.3085 = 0.5328

0.5328 = 53.28% probability that the length of hatching times is between 15 and 18 days.

4 0
2 years ago
Please help i dont know which one​
gregori [183]

Answer:

A. 72π m^3

Step-by-step explanation:

The radius of the cone would be half the diameter, or 6m.

The formula for the volume of a cone is:

V= (πr^2h) / 3

We can substitute what we have:

V = (π * (6)^2 * 6 )/ 3

V = (216 π) / 3

V = 72π m^3

8 0
3 years ago
If it is 9:00 what time will it be 25 minutes earlier
adell [148]

Answer:

8:35

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Other questions:
  • Aldo is mailing packages m. Each small package cost him $2.40 to send. Each large package cost him $3.80. How much will it cost
    6·1 answer
  • Sharita does special typing jobs for scientists. she charges 13 dollars for the first 3 pages and 3 dollars for each additional
    15·1 answer
  • An automobile dealership gives a discount of 8% if payment os made in cash. How much would a $17,500 car cost if the payment wer
    14·1 answer
  • Can you please help me solve
    5·1 answer
  • Ebony earns 2000 a month if she spends 450 a month
    6·1 answer
  • David invested $89,000 in an account paying an interest rate of 3.1% compounded continuously. Assuming no deposits or withdrawal
    8·2 answers
  • Which expression is equivalent to 52(2x+1)?
    9·2 answers
  • Please answer correctly !!!!! Will mark Brianliest !!!!!!!!!!!!!!
    12·1 answer
  • Pls help math
    9·1 answer
  • Y-2=-4(x-1) in standard form
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!