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Whitepunk [10]
3 years ago
5

The length of a social media interaction is normally distributed with a mean of three minutes and a standard deviation of 0.4 mi

nutes. what is the probability that an interaction last longer than four minutes
Mathematics
1 answer:
alexandr1967 [171]3 years ago
3 0
It depends on Y and x cause school said so 
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What is the total cost of a $720 ipad that is on sale at 15% off if the local sales tax is 6%
jasenka [17]

Answer:

$828

Step-by-step explanation:

15% = 0.15

0.15 x 720 = 108

total cost = $720 + $108 = $828

3 0
3 years ago
Brianna has x nickels and y pennies. She has no less than 20 coins worth no more
Bond [772]

Answer:

y \ge 20 - x

y \le 80 -5x

(x,y) = (15,5)

Step-by-step explanation:

Given

Nickels = x

Pennies = y

Amount = \$0.80 maximum

Coins = 20 minimum

Required

Solve graphically

First, we need to determine the inequalities of the system.

For number of coins, we have:

x\ +\ y\ge 20 because the number of coins is not less than 20

For the worth of coins, we have:

0.05x\ +\ 0.01y\ \le0.80 because the worth of coins is not more than 0.80

So, we have the following equations:

x\ +\ y\ge 20

0.05x\ +\ 0.01y\ \le0.80

Make y the subject in both cases:

y \ge 20 - x

0.01y \le 0.80 - 0.05x

Divide through by 0.01

\frac{0.01y}{0.01} \le \frac{0.80}{0.01} -\frac{ 0.05x}{0.01}

y \le \frac{0.80}{0.01} -\frac{ 0.05x}{0.01}

y \le 80 -5x

The resulting inequalities are:

y \ge 20 - x

y \le 80 -5x

The two inequalities are plotted on the graph as shown in the attachment.

y \ge 20 - x --- Blue

y \ge 80 -5x --- Green

Point A on the attachment are possible solutions

At A:

(x,y) = (15,5)

4 0
2 years ago
The value of the digit 8 in this number is 8
Nana76 [90]
And... i don't get it

6 0
3 years ago
Need help ASAP
Westkost [7]

Answer:

1.333 repeated

Step-by-step explanation:

8 0
2 years ago
PLSSS HELP IF YOU TURLY KNOW THISS
Nookie1986 [14]

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=================================

90.000.000 { \times 10}^{9}

=================================

\begin{gathered}\begin{gathered}\tiny\boxed{\begin{array} {} \red{\bowtie}\:\:\:\: \red{\bowtie}\\。◕‿◕。\end{array}}\end{gathered}\end{gathered}:BrainliestBunch

5 0
2 years ago
Read 2 more answers
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