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aleksklad [387]

2 years ago

10

Got It? Chemistry The pH of a substance equals -log[H+], where (H+] is

2 answers:

Natali5045456 [20]2 years ago

6 0

Answer:

The substance A has a greater pH.

pH is directly proportional to hydrogen ion concentration [H+], i.e the higher the [H+], the higher it pH.

Greater pH level - lesser pH level is 14.

why? it is so because, on the standard pH scale the highest point is 14 and the lowest point is 0.

Therefore the difference between those points is 14.

Naya [18.7K]2 years ago

4 0

Answer:

123k12

Step-by-step explanation:

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1. A luge race is very dangerous, and a crash can cause serious injuries. The league requires anyone who has a crash to have a t

antiseptic1488 [7]

Answer:

0.7061 = 70.61% probability she will have her first crash within the first 30 races she runs this season

Step-by-step explanation:

For each race, there are only two possible outcomes. Either the person has a crash, or the person does not. The probability of having a crash during a race is independent of whether there was a crash in any other race. This means that the binomial probability distribution is used to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

In which $C_{n,x}$ is the number of different combinations of x objects from a set of n elements, given by the following formula.

$C_{n,x} = \frac{n!}{x!(n-x)!}$

And p is the probability of X happening.

A certain performer has an independent .04 probability of a crash in each race.

This means that $p = 0.04$

a) What is the probability she will have her first crash within the first 30 races she runs this season

This is:

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

When $n = 30$

We have that:

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

$P(X = 0) = C_{30,0}.(0.04)^{0}.(0.96)^{30} = 0.2939$

$P(X \geq 1) = 1 - P(X = 0) = 1 - 0.2939 = 0.7061$

0.7061 = 70.61% probability she will have her first crash within the first 30 races she runs this season

7 0

2 years ago

Can someone please help me?

Ne4ueva [31]

9514 1404 393

Answer:

x = 6
y = 55

Step-by-step explanation:

Angles opposite congruent sides are congruent, so base angles D and F of this isosceles triangle have the same measure:

y = 55

__

The sum of angles in the triangle is 180°, so ...

55° +(11x +4)° +55° = 180°

11x = 66 . . . . . . . . divide by °, subtract 114

x = 6 . . . . . . . . . . .divide by 11

The values of x and y are 6 and 55, respectively.

5 0

3 years ago

Which of the following statements are true about the equation below?

solniwko [45]

The graph has a maximum value

3 0

3 years ago

Read 2 more answers

Help me pleaseeeeeeeee

Mashutka [201]

Answer:

The answer is 7

Step-by-step explanation:

25 times 25=625

24 time 24=576

625-576=7

And the square root of 49 is 7.

4 0

1 year ago

Read 2 more answers

Igoryamba

Answer:

∠B = 12°

∠C = 180 - 48° = 132° ( straight line angle = 180)

Sum of angles of a triangle = 180°

180 = ∠A + ∠B + ∠C

180 = ∠A + 12 + 132

180 - 144 = ∠A

∠A = 36°

option B

6 0

3 years ago