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Free_Kalibri [48]
3 years ago
9

I need the answer to number one because my parents don't understand. Thanks I'll give you 13 points

Mathematics
2 answers:
LuckyWell [14K]3 years ago
7 0
I think the answer's a 20/6.  Hope this helps
Papessa [141]3 years ago
4 0
I think it is right 20/6
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n chemistry, the pH of a solution is defined by: pH space equals space minus log space left square bracket straight H plus right
slavikrds [6]

Answer:

The correct option is;

pH = 4.1

Step-by-step explanation:

The given information are;

The hydrogen ion [H⁺] concentration in tomato juice = 10 ^{-4.1}

The pH of a solution = -㏒{H⁺] =  -㏒( 10 ^{-4.1}) = -(-4.1) × ㏒(10) = 4.1

The pH of the of the tomato juice = 4.1

The pH is the term used to refer to the acidity of water with the range of pH values ranging from 0 to 14 where pH values of a solution lesser than 7 are considered acidic while pH values above 7 indicate a basic solution.

4 0
4 years ago
Assume that when adults with smartphones are randomly​ selected, 57​% use them in meetings or classes. If 9 adult smartphone use
forsale [732]

Answer: 0.9617

Step-by-step explanation:

Given : The proportion of adults use their phones in meetings or classes : p=0.57

Number of adults randomly selected : n= 9

Let x be the random variable that represents the number of adults use their phones in meetings or classes.

By using binomial probability formula, to find the probability of getting success in x trials.

P(x)=^nC_xp^x(1-p)^{n-x}

The probability that at least 3 of them use their smartphones in meetings or classes will be :-

P(x\geq3)=1-P(x

Hence, the required probability is 0.9617 .

4 0
3 years ago
PLS HEKP. DUE IN 5 MINUTES
navik [9.2K]

Answer: C

Step-by-step explanation:

8 0
3 years ago
Simplify the the problem 2x^2-4x-390=0 ​
Sergio039 [100]

Answer:

The answer is <em>-195</em>

7 0
4 years ago
Solve the inequality. Graph the solution<br>+5&lt;2<br>The solution is a<br>6​
BartSMP [9]

Answer:

x<-3

The graph in the attached figure

Step-by-step explanation:

<u><em>The correct question is</em></u>

Solve the inequality. Graph the solution.

x+5<2

we have

x+5

Solve for x

Subtract 5 both sides

x

The solution is the interval (-∞,-3)

All real numbers less than -3

In a number line, the solution is the shaded area at left of x=-3 (open circle)

The number x=-3 is not included in the solution

The graph in the attached figure

7 0
4 years ago
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