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torisob [31]
3 years ago
13

Need this now plz

Mathematics
1 answer:
maks197457 [2]3 years ago
5 0

Answer:

c.60

Step-by-step explanation:

12 x 5 = 60

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Suppose the pH of a solution decreases by 9. How does the hydrogen ion concentration​ change?
Kisachek [45]

Answer:

hydrogen ion increases

Step-by-step explanation:

as the pH value decreases, the molecule becomes more acidic in nature. and a solution can be termed base when it contains OH-, and an acid when it contains a H+ ion.

the now formed solution will have attained 9 more H+ ions

6 0
3 years ago
Read 2 more answers
What is the 5th term of an arithmetic sequence of 20 terms with first and last terms of 2 and 59, respectively
Verizon [17]

Answer:

14

Step-by-step explanation:

aₙ = a₁ + (n-1)*d

59 = 2 + (20-1) * d

59 = 2 + 19d

19d = 59-2 = 57

d = 3

5th term: a₅ = 2 + 4 * 3 = 14

8 0
3 years ago
Say you want to know if boys are more likely than girls to "wait for their missionary". You take a random sample of 57 males and
Sergio [31]

Answer: 2 independent sample test of proportions

Step-by-step explanation:

The teo independent sample test of proportion is also referred to as the two proportion z-test and it simply allows the researcher to compare the two proportions in order to ascertain if they're the same or not.

In this case, the null hypothesis will be that that the proportions given in the research are the same while the alternate hypothesis will be that there is a difference between the proportions given.

7 0
3 years ago
Complete the pattern 3,665 3,765 3,865 _____. _____. _____.
rosijanka [135]
As we can see from the above the pattern is:

-In ascending order.

-A value of 100 is added to each new number.

The rest of the pattern will be:

3865+100. 3865+100×2. 3865+100×3

Therefore,the answer is: 3965. 4065. 4165.

Hope it helps!
5 0
3 years ago
an airplane takes off 12.5 miles south of a city and flies due north at a constant speed of 170 miles per hour. What is the plan
saveliy_v [14]
75 miles/hr* (45/60) hours=56.25. Initial position is -12.5. Add -12.5 to 56.25 which results in 43.75 miles due north.
6 0
4 years ago
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