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murzikaleks [220]
3 years ago
6

Can someone help me with 2-5?

Mathematics
1 answer:
zaharov [31]3 years ago
4 0
Problem 2

Let's say there are 1000 people at the game
0.27*1000 = 270 of them are students
0.06*1000 = 60 are students who didn't buy a program
60/270 = 0.222 = 22.2% of the students will not buy a program

So the answer is roughly 22% when rounded to one decimal place

===========================================================
Problem 3

Like with problem 2, we'll assume 1000 people at the game
0.73*1000 = 730 adults 
0.42*1000 = 420 adults buy a program
approximately 420/730 = 0.5753 = 57.53% of the adults bought a program which rounds to 58%

Answer: 58%

===========================================================
Problem 4

The answer here is simply 63% since this is the percent form of 0.63

The value 0.63 is the total for the "Yes" column

You already found this value by adding up the values in the "yes" column from the original table: 0.42+0.21 = 0.63

===========================================================
Problem 5

x = total number of students and adults combined

look in the "students" row and "no" column. The value of 0.06 is found there.

0.06*x = 35
0.06*x/0.06 = 35/0.06
x = 583.333
which rounds to 583

So there are 583 people.

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A tank contains 1600 L of pure water. Solution that contains 0.04 kg of sugar per liter enters the tank at the rate 2 L/min, and
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Let S(t) denote the amount of sugar in the tank at time t. Sugar flows in at a rate of

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and flows out at a rate of

(S(t)/1600 kg/L) * (2 L/min) = S(t)/800 kg/min

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\dfrac{\mathrm dS(t)}{\mathrm dt}+\dfrac{S(t)}{800}=\dfrac8{100}

e^{t/800}\dfrac{\mathrm dS(t)}{\mathrm dt}+\dfrac{e^{t/800}}{800}S(t)=\dfrac8{100}e^{t/800}

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Integrate both sides:

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S(t)=64+Ce^{-t/800}

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0=64+C\impleis C=-64

and so (b) the amount of sugar in the tank at time t is

S(t)=64\left(1-e^{-t/800}\right)

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01. En una piscigranja el 30% de boquichicos es el 20% del número de carachamas. Si sólo hay boquichicos y carachamas. ¿Qué porc
Simora [160]

Answer:

0.1. B) 50%

0.2 A) Psicología

Step-by-step explanation:

01. Dejemos que 'x' e 'y' representen el porcentaje de boquichicos y carachamas en la piscifactoría, tenemos;

Dado que el 30% de los boquichicos es el 20% del número de carachamas

30% x = 20% y

∴ 0.3 · x = 0.2 · y

Por lo tanto, tenemos;

x / y = 0,2 / 0,3 = 2/3

Por lo tanto, por cada 100% de pescado, tenemos;

x + y = 100%

x = 2/3 · y

2/3 · y + y = 100%

5 · años / 3 = 100

y = 100 × 3/5 = 60%

El porcentaje de carachamas en la finca, y = 60%

∴ x = 100% - y = 100% - 60% = 40%

El porcentaje de boquichicos en la finca, x = 40%

Por lo tanto, tenemos el 80% del pescado en la granja, obtenemos;

Si hay 100 peces en la granja, 80% = 80 peces

Pero el número de los 100 peces que son boquichicos en la granja = 40% × 100 = 40 peces

Por lo tanto, los boquichicos son la mitad del 80% del número de peces o el 50% de los peces en la piscifactoría.

La opción correcta es;

B) 50%

02. Tenemos;

El costo de un libro de psicología> El costo de un libro en inglés

El costo de un libro de matemáticas> El costo de un libro de historia

El costo de un libro de psicología> El costo de un libro de matemáticas

Por lo tanto, tenemos;

El costo de un libro de psicología> El costo de un libro de matemáticas> El costo de un libro de historia

∴ El libro de Psicología es más caro que todos los demás libros y, por tanto, es el libro más caro

La opción correcta es;

A) Psicología

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2 years ago
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