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
yarga [219]
3 years ago
12

There are fewer than 40 students enrolled in a certain class. If, at a certain time, 2/9 of the students are absent from school

and 1/4 of those in school have gone to the library, what is the total class enrollment?
a. 18
b. 27
c. 28
d. 32
e. 36
Mathematics
1 answer:
sladkih [1.3K]3 years ago
7 0
Well, we kinda hope that noone is splitting the students into parts;) so that means that the number of students must be divisible by 4 and 9, and since they don't have any divisors in common, it must be divisible by 4*9=36, and this is also the correct answer - 36.
You might be interested in
Direction: True or False
Reika [66]

Answer:

<u>True </u>Postulates are used to prove theorems.

<u>True</u> Two points determine a line

Step-by-step explanation:

A postulate, in mathematics, is a numerical property that cannot be directly proven, but it is still present, and no has exceptions. Postulates are often used to prove theorems, particularly in geometry. An example of this can be found in the midsegment theorem which states that the average of the two bases in a trapezoid gives the length of the midsegment. Depending on how one chooses to prove this, one could potenitally need the Parts-whole Postulate theorem. Thus, one can state that Postulates are used to prove theorems.

A line can be drawn to connect any two given points. Therefore, one can states that two points determine a line, as only two points are needed for one to draw a line between them.

3 0
3 years ago
Read 2 more answers
Find T, N, and B for the curve at the indicated point. [HINT: After finding T', plug in the specific value for t before computin
lyudmila [28]

Answer:

Step-by-step explanation:

Given that

r(t) = (t,t,e^t)

To find tangent, normal and binormal vectors at (0,0,1)

i) Tangent vector

r'(t) = (1,1,e^t)\\

At the particular point, r'(t) = (1,1,e)

Tangent vector = \frac{r'(t)}{||r'(t)||} \\=\frac{(1,1,e)}{\sqrt{1+1+e^2} } \\=\frac{(1,1,e)}{\sqrt{2+e^2} }

ii) Normal vector

T'(t) = (0,0,e^t)\\

At that point T'(t) = (0,0,e)/e = (0,0,1)

iii) Binormal

B(t) = TX N

= \left[\begin{array}{ccc}i&j&k\\1&1&e^t\\0&0&e^t\end{array}\right] \\= e^t(i-j)

8 0
4 years ago
Find the volume of this sphere.<br> Use 3 for TT.<br> V [?]in3<br> V = Tr3<br> 8 in
frutty [35]

Answer:

The volume of the sphere is 2048 in³.

Step-by-step explanation:

The volume of a sphere is given by:

V = \frac{4}{3}\pi r^{3}

Where:

r: is the radius = 8 in

Having the radius and by using 3 for π, the volume is:

V = \frac{4}{3}*3 (8 in)^{3} = 2048 in^{3}

Therefore, the volume of the sphere is 2048 in³.

I hope it helps you!        

4 0
3 years ago
What was one factor that caused the British to surrender at Yorktown?
bija089 [108]

Answer:

I believe the answer is D. I can guarentee you that C is incorrect at least

6 0
3 years ago
Read 2 more answers
Brody deposited $500 into an account that earns 4.2% interest compounded annually. He makes no additional deposits and no withdr
zaharov [31]
The answer is A $ 167

I=pr^t-p
I=500(104.2/100)^7-500
I=500(1.042^7-1)
I=$167.00 to nearest dollar
8 0
3 years ago
Other questions:
  • In a hypothesis test, the claim is μ≤25 while the sample of 34 has a mean of 21 and a population standard deviation of 5.9 from
    6·1 answer
  • What was the average number of guitars sold each Month?
    15·2 answers
  • The following are the ages (years) of 5 people in a room: 25, 18, 17, 13, 24 A person enters the room. The mean age of the 6 peo
    12·1 answer
  • How many months does it take for $700 to double at simple interest of 14%?
    13·1 answer
  • Janie is making fruit bars for the bake sale. She uses 14 cup of sugar for each batch she makes. She uses 8 cups of sugar to mak
    15·1 answer
  • The answer to a division problem is the __________.
    13·1 answer
  • I kinda understand this but not really and i really need the ec points.
    8·2 answers
  • B3 = 1000 Take the cube root of each side of the equation. Simplify the result.
    8·1 answer
  • Blake and Jacob went shopping for
    7·1 answer
  • Which THREE statements are correct for the angles shown on the figure?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!