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3 years ago

PLZ HELP ILL GIVE YOU 10 POINTS

Mathematics

2 answers:

nikklg [1K]3 years ago

7 0

Answer:

the one you have picked is the proper answer

qaws [65]3 years ago

7 0

Answer:

2x5x8

Step-by-step explanation:

To find the volume of a prism, you must multiple length times width times height.

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Audrey mowed 12 lawns in 9 hours. What was her rate of mowing in hours per lawn?

horsena [70]

12 lawns/9 hours = 1.33 lawns per hour

6 0

2 years ago

Read 2 more answers

assume that when adults with smartphones are randomly selected 15 use them in meetings or classes if 15 adult smartphones are ra

Tanzania [10]

Answer:

The probability that at least 4 of them use their smartphones is 0.1773.

Step-by-step explanation:

We are given that when adults with smartphones are randomly selected 15% use them in meetings or classes.

Also, 15 adult smartphones are randomly selected.

Let X = Number of adults who use their smartphones

The above situation can be represented through the binomial distribution;

$P(X = r) = \binom{n}{r}\times p^{r} \times (1-p)^{n-r} ; n = 0,1,2,3,.......$

where, n = number of trials (samples) taken = 15 adult smartphones

r = number of success = at least 4

p = probability of success which in our question is the % of adults

who use them in meetings or classes, i.e. 15%.

So, X ~ Binom(n = 15, p = 0.15)

Now, the probability that at least 4 of them use their smartphones is given by = P(X $\geq$ 4)

P(X $\geq$ 4) = 1 - P(X = 0) - P(X = 1) - P(X = 2) - P(X = 3)

= $1- \binom{15}{0}\times 0.15^{0} \times (1-0.15)^{15-0}-\binom{15}{1}\times 0.15^{1} \times (1-0.15)^{15-1}-\binom{15}{2}\times 0.15^{2} \times (1-0.15)^{15-2}-\binom{15}{3}\times 0.15^{3} \times (1-0.15)^{15-3}$

= $1- (1\times 1\times 0.85^{15})-(15\times 0.15^{1} \times 0.85^{14})-(105 \times 0.15^{2} \times 0.85^{13})-(455 \times 0.15^{3} \times 0.85^{12})$

= 0.1773

3 0

3 years ago

A number is 3 more than 2nd number, the sum of the two numbers is 17. Find the numbers.

Debora [2.8K]

Your numbers are 7 and 10

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3 years ago

A spinner numbered 1 to 6 is spun twice. What is the probability of getting a 3 on the first spin and an odd number on the secon

SashulF [63]

Answer:

0.083 repeating

Step-by-step explanation:

The chance of getting 3 on the first spin is 1/6 because there are 6 possible outcomes and 1/2 on the second spin because 1,3,5 are all odds and 2,4,6 are even and when you multiple them together you get 0.083 repeating.

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3 years ago

Please help! Nejcnrccn

mr Goodwill [35]

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3 years ago