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3 years ago

PLS HURRY I WILL MARK BRAINLIEST FOR CORRECT ANSWER!

Mathematics

2 answers:

dedylja [7]3 years ago

8 0

Answer:

it would take 8 hours brainlieast please

Step-by-step explanation:

GarryVolchara [31]3 years ago

4 0

Answer:

It is -3 degrees Celsius per 1 hour

Step-by-step explanation:

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How to find the rate in exponential growth formula A=P(1-r)^t

erma4kov [3.2K]

R = rate
A = P(1-r)^t
A^t = P(1-r)
A^t/P = 1-r
(A^t/P)-1 = -r
r = -((A^t/P)-1)

8 0

3 years ago

What is the value of the expression 2.6 x 10 to the power of 9 divided by 1.3 x 10 to the power of 2

bazaltina [42]

(2.6 * 10^9) / (1.3 * 10^2) =
(2.6 / 1.3) * (10^9) / (10^2) =
2 * 10^7 or 20,000,000 <===

7 0

3 years ago

help solve this problem Based on a poll, 62% of Internet users are more careful about personal information when using a public

erma4kov [3.2K]

Answer

The probability that among four randomly selected Internet users, at least one is more careful about personal information when using a public Wi-Fi hotspot is 0.979.

Step-by-step explanation:

Since 62% of Internet users are more careful about personal information when using a public Wi-Fi hotspot.

Therefore, the Probability of 62% of Internet users are more careful about personal information when using a public Wi-Fi hotspot is, p=0.62.

We have to find the probability that at least one user is more careful about personal information when using wi-fi hotspot.

Probability of internet users are not more careful about personal information when using a public wi-fi hotspot, i.e $q=1-p$

$q=1-0.62=0.38$

Use Binomial Distribution, i.e, $P\left ( X \right )=^nC_xp^xq^\left ( n-x \right )$

p=0.62, q=0.38, n=4.

Required Probability $P\left ( X\geq 1 \right )=P\left ( X=1 \right )+P\left ( X=2 \right )+P\left ( X=3 \right )+P\left ( X=4 \right )$

$P\left ( X\geq 1 \right )=1-P\left ( X=0 \right )$

=1- $^4C_0p^0q^\left ( 4-0 \right )$

=1- $4\cdot1\cdot q^\left ( 4-0 \right )$

=1- $4\cdot \left ( 0.38 \right )^4$

=1-0.02085136=0.97914864

Therefore, the probability that at least one users more careful about personal information when using wi-fi hotspot, i.e 0.979(approx).

RESULT:

<u>The result should not be impacted by this because volunteers are likely to have the most relevant responds.</u>

6 0

3 years ago

4. Lucy is k years old. She has a sister who is three years younger than she is and

WITCHER [35]

Answer:

4k - 8

Step-by-step explanation:

Lucy is k years old so we know k is an important part of this problem.
Sister 1 is 3 years younger, so she is k - 3 years old.
Sister 2 is 5 years less than twice Lucy's age therefore, she is 2k (twice Lucy's age) - 5 years old.
Now we have: k + (k - 3) + (2k - 5)
We can simplify like terms with the k's and get 4k. then we add (-3) and (-5) to get 4k - 8.

Hope this helps!

7 0

2 years ago

Sasha is walking in a marathon. The distance she traveled is proportional…

LenKa [72]

Answer:

If she walks at 2/hour and he walks at 3/hour, this means they cover a combined 5 miles of distance per hour. Since they are 90 miles apart, this implies that it'll take a combined 18 hours for them to meet.

SORRY

3 0

3 years ago