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kykrilka [37]
3 years ago
7

Please help! A chemist has 100ml of 25% acid solution. How much of the solution does she need to drain and replace with 70% acid

solution to obtain 100ml of 60% acid solution?
Mathematics
1 answer:
ratelena [41]3 years ago
7 0

Answer:

77.78

Step-by-step explanation:

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A recent survey estimated that 19 percent of all people living in a certain region regularly use sunscreen when going outdoors.
serg [7]

The correct option is: (E) It is plausible that the percent of all people living in the region who regularly use sunscreen is 18.5%.

<u>Step-by-step explanation:</u>

The margin of error is a statistic expressing the amount of random sampling error that occurred due to miscalculation and survey results. The margin error is usually a small amount of error.

Generally 5% of margin of error is common and acceptable. When the percentage of the margin of error increases, the confidence in the report result will be reduced.

The recent survey reveals that 19% of the people living in a certain region regularly use sunscreen when going outdoors. The permissible margin of error in this survey is 1%.

Probably the percentage of people using sunscreen in the particular region will be <u>18.5%. </u>

5 0
3 years ago
Choose Yes or No to tell whether or not the symbol needs to flip when completing this inequality:
a_sh-v [17]

Answer:

Yes because you are working with negatives

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
83. 6 in a complex number
grin007 [14]

Answer:

83.6 is a real number

Step-by-step explanation:

Since 83.6 83.6 is a real number, it is the real part (a) of the complex number a+bi a + b i . A real number does not contain any imaginary parts, so the value of b b is 0 0 . The answer is 83.6+0i 83.6 + 0 i

5 0
3 years ago
Awire 4 1/2 feet long is been cut into small pieces of wire each one and 1/4 feet long what is the maximum number of smaller pie
77julia77 [94]

Answer:

3

Step-by-step explanation:

Wire is 4 1/2 feet, or 4.5 feet.

Each smaller wire needs to be 1 1/4 feet, or 1.25 feet.

<em>How many whole 1.25 feet wire can we have from total of 4.5 feet wire?</em>

<em />

Let's divide:

\\frac{4.5}{1.25}=3.6

<em>thus we can have 3 whole "1.25 feet long" wire and fractional amount.</em>

<em />

<em>Hence, maximum number of smaller pieces is 3</em>

5 0
3 years ago
In parallelogram LMNO,NO=10.2 and LO=14.7 what is the perimeter of parallelogram LMNO?
Shtirlitz [24]
In parallelogram LMNO, NO = 10.2, and LO = 14.7. The basic property of a parallelogram that the opposite sides in a parallelogram are equal; so, two sides are 10.2 (NO=LM=10.2), and two sizes are 14.7, = (LO=MN=14.7).
The perimeter of the parallelogram LMNO is:
P= 2NO + 2LO.
P= (2 x 10.2)+(2 x 14.7).
P= 20.4 + 29.4.

So, P= 49.8.
3 0
3 years ago
Read 2 more answers
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