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Alex_Xolod [135]
3 years ago
15

I need help asap!!!!!!!!!!!

Mathematics
2 answers:
sergeinik [125]3 years ago
5 0
First, we need to total the number of students that took the test:
1 student got between 1-20%
3 students got between 21-40%
5 students got between 41-60%
8 students got between 61-80%
8 students got between 81-100%
Therefore, the sum of the students is 1+3+5+8+8 = 25 students in total
There were 16 students who got a 61% or above, so the fraction of students that got a 61% or higher is 16/25. Convert this to a decimal, and we get 0.64. To convert from decimal to percent, multiply the decimal by 100%, and the final answer is 64% of students got a 61 or better on the exam.
Reil [10]3 years ago
3 0
Ur answer will be 8% and do u need me to explain 
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The time it takes a student to walk from the dorm to the chemistry lab follows roughly a Normaldistribution with a mean of 20 mi
creativ13 [48]

Answer:

95.15%

Step-by-step explanation:

We have that the mean (m) is equal to 20, the standard deviation (sd) 3

They ask us for P (x <25)

For this, the first thing is to calculate z, which is given by the following equation:

z = (x - m) / sd

We have all these values, replacing we have:

z = (25 - 20) / (3)

z = 1.66

With the normal distribution table (attached), we have that at that value, the probability is:

P (z <1.66) = 0.9515

Which means that the probability that it arrives before 25 minutes is 95.15%

6 0
3 years ago
Find the measure of each interior angle of the regular polygon (The polygon has 12 sides)​
Nostrana [21]

Answer:

150°

Step-by-step explanation:

To find the sum of all the interior angles in a regular polygon, us this formula, where n is the number of sides: (n-2)*180

(12-2)=10

10*180=1800

Now we have the sum of all the angles. But we aren't done yet! We have to divide this value by the number of sides to find the measure of one angle.

So,

1800/12=

150

Hope this helps!

5 0
2 years ago
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What si the exponential form of 243
dezoksy [38]
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7 0
3 years ago
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In quadrilateral ABCD, AD is congruent to BC, and AD is parallel to BC. Andre has written a
Dahasolnce [82]

Answer:

AD is Congruent to BC and it's given, (given just means that it was already said or stated, and you don't need to do the work to find it) Angle DAC would be congruent to angle BAC (if that doesn't work, rearrange them to look like angle CAB). AC would be congruent to DB. Triangle ADC would be congruent to triangle BCD by (since i don't know exactly which way the letters are arranged is would either be SAS or SSA) and that's because you know two of the sides are congruent to each other and one angle.

I tried hard to sketch out what the shape looked like based on the information given, and that's because I need a visual of what the shape looks like. Sorry, this took so long to answer.

5 0
1 year ago
6 cm<br> 16 cm<br> What is the volume of the cylinder?
jenyasd209 [6]

V = 576 pi cm^3

Step-by-step explanation:

The volume of a cylinder is given by

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V = pi * (6)^2 * 16

V = pi *36*16

V = 576 pi cm^3

5 0
3 years ago
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