Saac has 12 stars and makes 3 equal groups. How many stars are in each group?

In a group of 15 children the ratio of the boy : the girl is 2: 3: 5 more girls join the group. Calculate the percentage of boys

marta [7]

Answer:

Percentage of new group boys = 30%

Percentage decrease for the boys = 10%

Increase percent of the girls = 10%

Step-by-step explanation:

Given:

Number of children = 15

Ratio (Boys to Girls) = 2 : 3

Number of more girls join = 5

Find:

Percentage of boys in new group

Percentage decrease for the boys

Increase percent of the girls

Computation:

Number of boys = 15[2/5]

Number of boys = 6

Number of girls = 15[3/5]

Number of girls = 9

Percentage of boys = [6 / 15]100

Percentage of boys = 40%

Percentage of girls = [9 / 15]100

Percentage of girls = 60%

New number of students = 15 + 5

New number of students = 20

New number of boys = 6

New number of girls = 9 + 5 = 14

Percentage of new group boys = [6 / 20]100

Percentage of new group boys = 30%

Percentage of new group girls = [14 / 20]100

Percentage of new group girls = 70%

Percentage decrease for the boys = 40% - 30%

Percentage decrease for the boys = 10%

Increase percent of the girls = 70% - 60%

Increase percent of the girls = 10%

8 0

3 years ago

What is the volume of a cylinder with a height of 4xy^4 and a radius of 2x? (The formula fo

OLga [1]

Answer:

volume: $\sf 16\pi x^3y^4$

given:

height: $\sf 4xy^4$

radius: $\sf 2x$

cylinder volume:

$\hookrightarrow \sf \pi r^2h$

$\hookrightarrow \sf \pi (2x)^2(4xy^4)$

$\hookrightarrow \sf \pi (4x^2)(4xy^4)$

$\hookrightarrow \sf 16\pi x^3y^4$

3 0

1 year ago

PLZ HELP ASAP WILL MARK BRAINLIEST

RSB [31]

Answer:

72 $\sqrt{3}$

Step-by-step explanation:

The area (A) of a rhombus is calculated as

A = $\frac{1}{2}$ × d₁ × d₂ (d₁ and d₂ are the diagonals )

The diagonals bisect each other at right angles

d₁ = 2 × 6 = 12

Use the tangent ration in the upper left right triangle and the exact value

tan60° = $\sqrt{3}$

tan60° = $\frac{opposite}{adjacent}$ = $\frac{opp}{6}$ = $\sqrt{3}$ ( multiply both sides by 6 )

opp = 6 $\sqrt{3}$ , then

d₂ = 2 × 6 $\sqrt{3}$ = 12 $\sqrt{3}$

Thus

A = $\frac{1}{2}$ × 12 × 12 $\sqrt{3}$ = 6 × 12 $\sqrt{3}$ = 72 $\sqrt{3}$

3 0

2 years ago

Answer tis please thanks

harkovskaia [24]

Answer:

12

Step-by-step explanation:

8 0

1 year ago

Read 2 more answers

Sara can type 90 words in 4 minutes. About how many words would you expect her to type in 10 minutes at this rate?

Talja [164]

Answer:

She can type 225 words in 10 minutes

Step-by-step explanation:

We can find the rate by dividing the number of words by the time

90 words/ 4 minutes

22.5 words per minute

Now to find the number of words in 10 minutes, multiply the rate times the time

22.5 * 10 = 225

She can type 225 words in 10 minutes

5 0

2 years ago

Read 2 more answers

Saac has 12 stars and makes 3 equal groups.How many stars are in each group?