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alexandr402 [8]
3 years ago
14

A sphere has diameter 28 cm. If the diameter is divided by 2, what is the effect on the surface area?

Mathematics
1 answer:
spayn [35]3 years ago
4 0

Answer:

The surface area is divided by 4.

Step-by-step explanation:

Surface area of a sphere is 4πr².

When the diameter is 28 the radius is 14. So: 4π(14)² = 784π

If you cut the diameter in half you get 14. The radius is now 7.

4π(7)² = 196π.

784/4 = 196 so divided by 4.

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Find the probability.
KATRIN_1 [288]

Using it's concept, it is found that there is a 0.0366 = 3.66% probability that your coach and your friend get orange and you get a fruit-punch.

<h3>What is a probability?</h3>

A probability is given by the <u>number of desired outcomes divided by the number of total outcomes</u>.

In this problem, there are 15 bottles.

  • 5 are orange, hence the is a 5/15 = 1/3 probability that the coach gets orange, hence P(A) = 1/3.
  • After the coach, there will be 14 bottles remaining, of which 4 are orange, hence the probability that the friend gets orange is of P(B) = 4/14 = 2/7.
  • For you, there will be 13 bottles remaining, of which 5 will be of fruit-punch, hence the probability you get fruit-punch is of P(C) = 5/13.

The probability of the three outcomes occurring is given by:

p = \frac{1}{3} \times \frac{2}{7} \frac{5}{13} = \frac{10}{273} = 0.0366

0.0366 = 3.66% probability that your coach and your friend get orange and you get a fruit-punch.

More can be learned about probabilities at brainly.com/question/14398287

#SPJ1

6 0
2 years ago
Han is hiring laborers to cut down and remove 8 large trees from his
Scorpion4ik [409]

company a

Step-by-step explanation:

if the work for company b takes more than two days is gonna be more than 1,000 dollars and if he pick company a he would owe 1,000 no matter how many days it takes

5 0
3 years ago
The median of the values 3.4, 4.7, 1.9, 7.6, and 6.5
vladimir2022 [97]

Answer:

4.7

Step-by-step explanation:

the median is the middle number in a set of numbers so first we need to put them in order

1.9 3.4 [4.7] 6.5 7.6

this one is easy since we have an odd number of digits

the answer is 4.7

5 0
3 years ago
Evaluate the equation​
monitta

Answer:

15

Step-by-step explanation:

4 0
4 years ago
Read 2 more answers
Using the keys above, enter an expression equivalent to (-7x^2+4x-3)+(6x-15) using the fewest possible terms.
navik [9.2K]

Answer:

Final answer in simplified form is -7x^2+10x-18

Step-by-step explanation:

Given expression is (-7x^2+4x-3)+(6x-15)

Now we need to find an equivalent expression for (-7x^2+4x-3)+(6x-15)

First we can distribute the positive sign and remove the parenthesis the combine like terms

(-7x^2+4x-3)+(6x-15)

=-7x^2+4x-3+6x-15

=-7x^2+4x+6x-3-15

=-7x^2+10x-18

Hence final answer in simplified form is -7x^2+10x-18

7 0
3 years ago
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