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azamat
3 years ago
11

What is equivalent to logbase2n=4?

Mathematics
1 answer:
Wittaler [7]3 years ago
5 0
I'm pretty sure its B (:
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What is completely factored form of d^4-81
romanna [79]

Answer:

(d − 3) (d + 3) (d² + 9)

Step-by-step explanation:

d⁴ − 81

Factor using difference of squares.

(d² − 9) (d² + 9)

Factor using difference of squares again.

(d − 3) (d + 3) (d² + 9)

5 0
3 years ago
Ill give brainliest if correct
Firlakuza [10]

Answer:

The answer is t/3=20

The right diagram is the one that has the orange boxes with 20s and has a t on top

8 0
3 years ago
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What is the surface area of a sphere with the given dimension? Express your answer to nearest hundredth. Use 3.14 for pi. Radius
pav-90 [236]
Okay. The equation for a sphere's surface area is A = 4 * pi * r^2. Let's plug 5 in for r. 
4 \pi (5^2) = 4(3.14)*25 = 100 * 3.14 = 314
I got 314 cm^2 is the surface area, but it always helps to double check work! Hope this helps!
3 0
3 years ago
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The shorter leg of a 30°-60°-90° triangle is 4. How long is the hypotenuse?
Lera25 [3.4K]

For a triangle 30-60-90,

If shorter leg is x, then hypotenuse is 2x.

So, if shorter leg is 4,

then hypotenuse is 2*4 = 8.

Answer is 8.

8 0
3 years ago
A vendor at a street fair sells popcorn in cones, all of height 9 inches. The
Tatiana [17]

Answer:

The sharing cone holds about 9 times more popcorn than the skinny cone.

Step-by-step explanation:

The volume of a cone is given by the following formula:

V = \frac{\pi r^{2}h}{3}

In which r is the radius and h is the height.

Two cones:

Both have the same height.

The sharing-size cone has 3 times the radius of the skinny-size cone.

Skinny:

radius r, height h. So

V_{sk} = \frac{\pi r^{2}h}{3}

Sharing size:

radius 3r, height h. So

V_{sh} = \frac{\pi (3r)^{2}h}{3} = \frac{9\pi r^{2}h}{3} = 3\pi r^{2}h

About how many times more popcorn does the sharing cone hold than the skinny cone?

r = \frac{V_{sh}}{V_{sk}} = \frac{3\pi r^{2}h}{\frac{\pi r^{2}h}{3}} = \frac{3*3\pi r^{2}h}{\pi r^{2}h} = 9

The sharing cone holds about 9 times more popcorn than the skinny cone.

3 0
3 years ago
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