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4 years ago

What is three quarters of 28? How do you do the sum?

Mathematics

2 answers:

harkovskaia [24]4 years ago

6 0

3/8*28

Cancel 4 and 28
3*7

Multiply 3 by 7 to get 21.
21

3/4 of 28 is 21

dem82 [27]4 years ago

5 0

There are four parts to a quarter so you divide 28 by 4:
28/4=7
and then because you want to know three quarters you just times 7 by 3:
7x3=21
therefore three quarters of 28 is 21

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3 years ago

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Anton [14]

Answer:

The closest amount paid is $23

Step-by-step explanation:

Given

$Price = \$32$

$Mark\ down = 20\%$

Amount = 10% of Marked down price

Required

Determine the amount paid

First, we calculate the marked down price P2:

$P_2 = Price(1 - Mark\ down)$

Substitute values for Price and Mark down

$P_2 = \$32 * (1 - 20\%)$

Express percentage as decimal

$P_2 = \$32 * (1 - 0.20)$

$P_2 = \$32 * (0.80)$

Remove bracket

$P_2 = \$32 * 0.80$

$P_2 = \$25.6$

The payable amount is 10% off the marked down price,

This is calculated as:

$Amount = P_2 - P_2 * 10\%$

Substitute $25.6 for P2

$Amount = \$25.6 - \$25.6* 10\%$

Express percentage as decimal

$Amount = \$25.6 - \$25.6* 0.10$

$Amount = \$25.6 - \$2.56$

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The closest amount paid is $23

8 0

3 years ago

Para hacer 600 m de una obra, 30 obreros han trabajado 12 dias a razon de 10 horas diarias. ¿Cuantos dias necesitaran 36 obreros

Gwar [14]

Respuesta:

25 días

Explicación paso a paso:

Dado :

escenario 1

Área = 600 m

Número de días = 12

Número de trabajadores = 30

Tasa = 6

Escenario 2:

Área = 900 m

Número de días = n

Número de trabajadores = 36

Tasa = 6

Igualar los parámetros en cada escenario:

12 / n = 36/30 * 6/10 * 600/900

12 / n = 6/5 * 3/5 * 2/3

12 / n = 6/5 * 1/5 * 2/1

12 / n = 12/25

12 * 25 = 12n

300 = 12n

n = 300/12

n = 25 días

7 0

3 years ago

A tram moved downward 54 meters in 6 seconds at a constant rate. What was the change in the tram's elevation each second?

Black_prince [1.1K]

Answer:

9 m/s

Step-by-step explanation:

To calculate the change in the tram's elevation each second, you must divide the given figures which is now the given formula of $\frac{meters}{seconds}$ ;