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DiKsa [7]
3 years ago
15

Collin is collecting rocks for a science project. So far, he has collected 36 rocks, which is 90% of the total he needs. How man

y total rocks does Collin need for his science project?
Mathematics
2 answers:
Doss [256]3 years ago
8 0

Answer:

he needs 4 more

Step-by-step explanation:

kati45 [8]3 years ago
3 0

Answer:

40 total rocks

Step-by-step explanation:

100 * 36 / 90 = 40

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You are skiing down a mountain whit a vertical height of 1200 feet. The distance from the top of the mountain to the base is 250
tatiyna

Answer:

have a great day i dont know about this

Step-by-step explanation:

6 0
3 years ago
Factor completely.<br> 2x^4 + 4x^3 - 30x^2 =
den301095 [7]

Answer:

2x^2(x-3)(x+5)

Step-by-step explanation:

The first thing that you can do is to factor out an x^2 from the expression.

x^2(2x^2+4x-30)

The next step is to factor out a 2.

2x^2(x^2+2x-15)

Finally, you can factor the quadratic inside.

2x^2(x-3)(x+5)

And now you're finished! Hope this helps!

6 0
4 years ago
Read 2 more answers
The diagram shows a square ABCD with sides of length 20cm. it also shows a semi circle and an arc circle AB is the diameter of t
Brut [27]

Answer:

Area of Shaded Region =50\pi$ cm^2

Area of Semicircle =50\pi$ cm^2

\dfrac{\text{Area of Shaded region}}{\text{Area of Square}}=\dfrac{ \pi}{8}

Step-by-step explanation:

Area of Shaded Region = Area of Sector - Area of Semicircle

<u>Area of Sector</u>

Radius of the sector =20cm

=\frac{90}{360}X\pi *20^2\\ =100\pi cm^2

<u>Area of Semicircle</u>

Since AB is the diameter of the semicircle

Radius of the Semicircle=20/2=10cm

Area of semicircle

=\frac{\pi r^2}{2}\\ =\frac{\pi *10^2}{2}\\=50\pi cm^2

Therefore, area of Shaded Region

=100\pi -50 \pi\\=50\pi$ cm^2

Area of Square =20 X 20 =400 cm^2

\dfrac{\text{Area of Shaded region}}{\text{Area of Square}} \\=\dfrac{50 \pi}{400} \\=\dfrac{ \pi}{8}

4 0
3 years ago
Please help meee I need this done ASAP
statuscvo [17]

Answer:

4pi/15=θ  - i think

Step-by-step explanation:

S = r*θ

r=9

s=12pi/5

12pi/5=9*θ

12pi/45=θ

4pi/15=θ

6 0
3 years ago
Using the scenario below, identify the independent and dependent variables. Be sure to include evidence and
Bess [88]

Answer:

Dependent Variable: Height of bounce

Independent Variable: Type of ball

Step-by-step explanation:

Dependent variable is what is being tested while the independent variable is what changes in the experiment or what causes the dependent variable results to change.

7 0
3 years ago
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