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Natasha2012 [34]
3 years ago
6

A blood bank needs 9 people to help with a blood drive. 12 people have volunteered. Find how many different groups of 9 can be f

ormed from the 12 volunteers.
Mathematics
1 answer:
horrorfan [7]3 years ago
5 0

Answer:

A shipping tube is shaped like a triangular prism. The bases are equilateral triangles with edges of 5 inches and a height of 4.3 inches. The tube is 14 inches long. Find the total surface area of the shipping tube.

253 square inches

231.5 square inches

161.5 square inches

221.75 square inches

Step-by-step explanation:

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The radius of a circle is 12 miles. What is the angle measure of an arc bounding a sector with area 10​ square miles?
hram777 [196]

\bf \textit{area of a sector of a circle}\\\\ A=\cfrac{\theta \pi r^2}{360}~~ \begin{cases} r=radius\\ \theta =angle~in\\ \qquad degrees\\[-0.5em] \hrulefill\\ A=10\\ r=12 \end{cases}\implies 10=\cfrac{\theta \pi 12^2}{360}\implies 10=\cfrac{2\pi \theta }{5} \\\\\\ 20=2\pi \theta \implies \cfrac{20}{2\pi }=\theta \implies \cfrac{10}{\pi }=\theta \implies 3.18\approx \theta

6 0
3 years ago
The length of the titanic was 882 feet. porter’s history class is building a model of the titanic. The model is 1/100 of the act
skelet666 [1.2K]

Answer:

8.82

Step-by-step explanation:

882x0.01=8.82

3 0
4 years ago
De un total de 24 niñas 1/4 practican natación, 1/2 juega volibol y el resto no practica ningún deporte. ¿Cuántas niñas no pract
masya89 [10]

Answer:

6 niñas no practican ningún deporte.

Step-by-step explanation:

De un total de 24 niñas, \frac{1}{4} practican natación. Esto se expresa mediante la operación matemática:

\frac{1}{4} *24

Para multiplicar una fracción por un número entero, cualquier entero n puede ser escrito como la fracción \frac{n}{1}. Entonces en este caso:

\frac{1}{4} *24=\frac{1}{4} *\frac{24}{1}

Ahora se multiplican los denominadores para obtener el denominador final y se multiplican los numeradores para obtener el numerador final:

\frac{1}{4} *24=\frac{1}{4} *\frac{24}{1}=\frac{1*24}{4*1}=\frac{24}{4}

Finalmente, se reduce el resultado hasta llegar a la forma más simple. Para obtener un resultado simplificado, se divide el numerador por el denominador.  En este caso, para reducir la fracción \frac{24}{4}, se divide 24 por 4. El resultado obtenido es 6. Esto indica que de un total de 24 niñas, 6 practican natación.

Por otro lado, de un total de 24 niños, \frac{1}{2} juegan voleibol. Esto se expresa mediante la operación matemática:

\frac{1}{2} *24

Resolviendo de manera similar a lo previamente calculado, se obtiene:

\frac{1}{2} *24= 12

Esto indica que de un total de 24 niñas, 12 practican voleibol.

Por lo que 6 niñas practican natación y 12 voleibol, siento un total de 18 niñas las que practican algún deporte. Por lo que la cantidad de niñas que no practican ningún deporte se calcula mediante:

24 niñas - 18 niñas que practican algún deporte= 6 niñas

<u><em>6 niñas no practican ningún deporte.</em></u>

6 0
3 years ago
a shea cd player costs $80 last year and $112 this year. what was the percent of increase in its price
Alenkasestr [34]

Answer:

at first subtract 80 from 112 then divide it by 80 after that multiply it by 100%

4 0
3 years ago
Please hlelp meeeeeeeeeeeeee i need help
monitta

Answer:

3/4

Step-by-step explanation:

Total number of cases = 8  [1,2,4,2,5,3,1,2]

No. of number less than 4 = 6 [1,2,2,3,1,2]

Probability = 6/8 = 3/4

4 0
3 years ago
Read 2 more answers
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