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Burka [1]
3 years ago
13

A chemist is using 327 milliliters of a solution of acid and water. If 13.1% of the solution is acid, how many milliliters of ac

id are there? Round your answer to the nearest tenth.
Mathematics
1 answer:
fgiga [73]3 years ago
3 0

Answer:

42.837 milliliters

Step-by-step explanation:

327 x 0.131 = 42.837

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What is the equation of this circle?
Marat540 [252]

you have to show us the circle mate???

7 0
3 years ago
On a fair 6-sided die each number has an equal probability p of being rolled. When a fair die is rolled n times, the most likely
Feliz [49]
A 1.5 standard deviation above the mean is
np + 1.5 <span>√(np(1-p))

We are given with
np = 200
p = 200/n
The standard deviation is
</span><span>√200(1-200/n))

Substituting
200 + 1.5 </span>√200(1-200/n))
By inspection, if the value of n is 200, then the radical will result to the value of 1. Only by increasing the value of n greater than 200 will the radical result to a value of less than 1 and decreasing the spread of the mean.
The answer is
the minimum is 201
the maximum is infinity
3 0
2 years ago
Find the quadratic function y=​f(x) whose graph has a vertex ​(−3​,4​) and passes through the point ​(−7​,0). Write the function
olganol [36]

Answer:

Step-by-step explanation:

This is a parabola since a quadratic is a parabola.  The standard form for a parabola is y = ax² + bx + c

but before we do that, we will use the vertex form, since it will make our work easier at the beginning.  

First and foremost, when we plot the vertex and the given point, the vertex is higher up than is the point; that means that this parabola opens upside down, and its vertex form will be

y=-|a|(x - h)² + k

The absolute value is out in front of the a, so we know that the value of a is positive, but the quadratic itself is negative (upside down) and we will find that math takes care of that negative that needs to be out front.  So we need to solve for a by filling in the x, y, h, and k values from the point and the vertex:  x = -7, y = 0, h = -3, k = 4

0 = a(-7 - (-3))² + 4 and

0 = a(-7 + 3)² + 4 and

0 = a(-4)² + 4 and

0 = a(16) + 4 and

0 = 16a + 4 and

-4 = 16a so

a=-\frac{1}{4}

Now that we know a, we can plug it back into the vertex form and then put it into standard form from there.

y=-\frac{1}{4}(x+3)^2+4

Now we will FOIL out what's inside the parenthesis to get

y=-\frac{1}{4}(x^2+6x+9)+4

Simplify by distributing the -1/4 into the parenthesis:

y=-\frac{1}{4}x^2-\frac{3}{2}x-\frac{9}{4}+4

Combine like terms to get

y=-\frac{1}{4}x^2-\frac{3}{2}x+\frac{7}{4}

And there you go!

5 0
3 years ago
Show how to rewrite 1/5 with the denominator 10.
Gnoma [55]

Answer:

first blank: 2

second blank: 2

8 0
2 years ago
The numbers -12, -7, -2, 3 follow a pattern. What are the next three numbers in this pattern?
Bas_tet [7]

Answer:

8,13

Step-by-step explanation:

The pattern in +5 so 3+5=8, and 8+5=13

6 0
3 years ago
Read 2 more answers
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