3 years ago

The volume (V) of a sphere is given by the formula V= 4/3 Pi r^3 The sphere’s radius (r) is?

Mathematics

1 answer:

Elina [12.6K]3 years ago

7 0

The sphere's radius is half of the diameter. A diameter is the length of a circle through the center.

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It's very easy... just do 36/4.
36/4= 9.

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A group of friends is sharing 25 pounds of berries. Type the answer to each question in the boxes below. If each friend received

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2 years ago

Jia is skipping a rock across a pond. The sequence {4.2, 3.57, 3.0345, 2.5793, …} describes the height of the rock on each succe

mylen [45]

Answer:

$u_n=4.2(0.85)^{n-1}$

Step-by-step explanation:

$u_1=4.2\\u_2=3.57\\u_3=3.0345\\u_4=2.5793$

Geometric formula sequence: $u_n=ar^{(n-1)}$

(where $a$ is the first term of the sequence and $r$ is the common ratio)

To find the common ratio, divide one of the terms by the previous term:

$r=\frac{u_2}{u_1} =\frac{3.57}{4.2} =0.85$

From inspection, $a=4.2$

Therefore, $u_n=4.2(0.85)^{n-1}$

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Ruben bought a DVD recorder for 240 $. Now, it is on sale for 180 $. Find the percentage of change in the price

xenn [34]

Answer:

Step-by-step explanation:

orginal :$240

new/sale: $180

Percentage of Change:

(V2−V1)|V1|×100

=(180−240)|240|×100

=−60240×100

=−0.25×100

=−25%change

=25%decrease

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3 years ago