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Alina
22 days ago
9

A leather ball has a diameter of 28.4 cm. Which is the area of the piece of leather used on the surface of the ball?

Mathematics
2 answers:
Zina [9.1K]22 days ago
7 0

Result:

This has the same diameter as the sphere, while the height matches its diameter.... The surface area of a soccer ball equals 250 square inches.... An official basketball has a radius of 12.5 cm and... the amount of leather needed to cover 12 official balls.

Step-by-step explanation:

Svet_ta [9.5K]22 days ago
5 0

Result:

2534 cm^2 rounded to the nearest whole number.

Step-by-step explanation:

The ball conforms to the sphere formula for surface area, which is 4 pi r^2

The radius r = 1/2 the diameter = 1/2 * 28.4

= 14.2 cm.

The surface area calculation yields = 4 * pi * 14.2^2

= 2533.88 cm^2

You might be interested in
Consider randomly selecting a student at a large university. Let A be the event that the selected student has a Visa card, let B
Zina [9179]

Response:

a. 0.76

b. 0.23

c. 0.5

d. p(B/A) signifies the likelihood that a student with a visa card also possesses a MasterCard.

p(A/B) indicates the probability that a student with a MasterCard also has a visa card.

e. 0.35

f. 0.31

Detailed explanation:

a. p(AUBUC) = P(A) + P(B) + P(C) - P(AnB) - P(AnC) - P(BnC) + P(AnBnC)

        = 0.6 + 0.4 + 0.2 - 0.3 - 0.11 - 0.1 + 0.07 = 0.76

b. P(AnBnC') = P(AnB) - P(AnBnC)

        = 0.3 - 0.07 = 0.23

c. P(B/A) = P(AnB)/P(A)

        = 0.3/0.6 = 0.5

e. P((AnB)/C) = P((AnB)nC)/P(C)

        = P(AnBnC)/P(C)

        = 0.07/0.2 = 0.35

f. P((AUB)/C) = P((AUB)nC)/P(C)

        = (P(AnC) U P(BnC))/P(C)

        = (0.11 + 0.1)/0.2

        = 0.21/0.2 = 0.31

7 0
21 day ago
Problem 8-4 A computer time-sharing system receives teleport inquiries at an average rate of .1 per millisecond. Find the probab
Svet_ta [9518]

Response:  a) 0.9980, b) 0.0013, c) 0.0020, d) 0.00000026, e) 0.0318

Detailed explanation:

In Problem 8-4, the computer time-sharing system experiences teleport inquiries at an average rate of 0.1 per millisecond. We are tasked with determining the probabilities of the inquiries over a specific period of 50 milliseconds:

Given that

\lambda=0.1\ per\ millisecond=5\ per\ 50\ millisecond=5

Applying the Poisson process, we find that

(a) at most 12

probability=  P(X\leq 12)=\sum _{k=0}^{12}\dfrac{e^{-5}(-5)^k}{k!}=0.9980

(b) exactly 13

probability= P(X=13)=\dfrac{e^{-5}(-5)^{13}}{13!}=0.0013

(c) more than 12

probability= P(X>12)=\sum _{k=13}^{50}\dfrac{e^{-5}.(-5)^k}{k!}=0.0020

(d) exactly 20

probability= P(X=20)=\dfrac{e^{-5}(-5)^{20}}{20!}=0.00000026

(e) within the range of 10 to 15, inclusive

probability=P(10\leq X\leq 15)=\sum _{k=10}^{15}\dfrac{e^{-5}(-5)^k}{k!}=0.0318

Thus, a) 0.9980, b) 0.0013, c) 0.0020, d) 0.00000026, e) 0.0318

6 0
17 days ago
an element with mass 430 grams decays by 27.4% per minute. How much of the element is remaining after 19 minutes, to the nearest
Leona [9271]

Answer:

1.0 gram (rounded from.98)

Step-by-step explanation:

This is an exponential equation represented as a*b^x, where a denotes the initial quantity and b represents the rate of decay (or growth). The initial amount a is straightforward, being 430, but for b, ensure it's expressed in decimal form. To convert the percentage (like 27.4%) to decimal, simply move the decimal point two places to the left, yielding.274.

Next, with the equation 430*.274^x, we can apply the value of x as 19.

Also, be aware that if different units are involved, like if t represented a decay over 19 hours, those would need to be converted as well. I'm here to help if you require further clarification.

8 0
29 days ago
If a histogram of a sample of​ men's ages is​ skewed, what do you expect to see in the normal quantile​ plot?
babunello [8423]

Response: The points do not align in a linear fashion

Detailed explanation:

5 0
22 days ago
On each coordinate plane, the parent function f(x) = |x| is represented by a dashed line and a translation is represented by a s
Leona [9271]

Response:

In every coordinate plane, the baseline function f(x) = |x| is illustrated by a dashed line while a translation is denoted by a solid line. Which graph depicts the translation g(x) = |x + 2| as a solid line?

In a coordinate plane, the dashed line of the absolute value graph shows a vertex at (0, 0). Meanwhile, a solid line absolute value graph has a vertex at (2, 0).

In a coordinate plane, the dashed line of the absolute value graph has its vertex positioned at (0, 0) while the solid line graph shows a vertex at (0, negative 2).

In a coordinate plane, the dashed line for absolute value has a vertex at (0, 0) while a solid line has a vertex at (negative 2, 0).

In a coordinate plane, the dashed absolute value graph has its vertex at (0, 0) while the solid line version shows a vertex at (0, 2).

Detailed clarification:

I have the same query, please assist.

5 0
27 days ago
Read 3 more answers
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