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Alinara [238K]
3 years ago
8

What is the density of a block with a mass of 420 g and a length of 2cm, 3cm wide, and 1cm long​

Mathematics
1 answer:
Basile [38]3 years ago
4 0

Answer:

Step-by-step explanation:

Find the volume first.

V= l * w * h

l = 2    cm

w = 3  cm

h = 1   cm

V = 2 * 3 * 1 = 6 cm^3

Density = mass / volume

Density  = 420 grams / 6 cm^3

Density = 70 grams / cc^3

Kind of large. Check your givens.

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A school custodian waxed a gymnasium floor that measured 20feet by 20 feet. How many square feet did she have to wax
Aleks04 [339]

Here the dimension of the waxed gymnasium floor is given which is 20 feet by 20 feet. It means the floor is of square shape . And we need to find how many square feet she have to wax. Here square feet is given, which means we have to find the area. SO we need to find the area of the gymansium floor . And area of square is side square. So area of gymnasium floor = 20 ft times 20 ft = 400 square feet .

8 0
3 years ago
Gabby is buying flowers for a friend. She can choose daisies, carnations, or sunflowers. She can put the flowers in a clear, red
FrozenT [24]

Combination tells the number of ways an object can be arranged. The number of all of the possible combinations Gabby can have is 9.

<h3>What is Combination?</h3>

The combination helps us to know the number of ways an object can be arranged without a particular manner. A combination is denoted by 'C'.

^nC_r = \dfrac{n!}{r!(n-r)!}

where,

n is the number of choices available,

r is the choices to be made.

We know that the number of options of the flower with Gabby is 3( daisies, carnations, or sunflowers) and the color choices she has is (clear, red, or blue), therefore, she ^3C_1 choices for the flower, also, she has ^3C_1 choices for color.

\text{Total number of choices with Gabby} = \text{Choices of flower} \times \text{Choices of color}

                                                         = ^3C_1 \times ^3C_1 \\\\= 9

Hence, the number of all of the possible combinations Gabby can have is 9.

Learn more about Combination:

brainly.com/question/11732255

6 0
2 years ago
In order for the table below to show exponential decay, what must the value of d be in the table below?
Eduardwww [97]
Let x represent the domain
Let y represent the range.

Assume that y =a*b⁻ˣ

Set x=0:
a*b⁰ = 32
a = 32

Set x=1:
32*b⁻¹ = 24
32 = 24b
b = 32/24

Set x=2:
d = 32*(32/24)⁻²
   = 32*(24/32)²
   = (32*24*24)/(32*32) = 24²/32 = 576/32
   = 18

Answer: 18
9 0
3 years ago
Read 2 more answers
A circle has a diameter of 4 inches. A square has a side length of 4 inches. What is true about the areas of these two figures?
Nuetrik [128]
The area of the square is greater than the circle: the area of the circle is pi(r)^2 while the area of the square is length times width. The area of the circle is about 12.5 while the area of the square is 16.
4 0
3 years ago
8 percent of what number is 2
Sedbober [7]
8%×n=2. 2÷8/100=2×100/8=100/4=25. so the answer is 25.
5 0
3 years ago
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