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valina [46]
3 years ago
7

The lengths of songs on the radio are normally distributed with a mean length of 210 seconds, If 38.2% of all songs have lengths

between 194 and 226, then the stadard deviation of this distribution is
Mathematics
1 answer:
gladu [14]3 years ago
8 0
 i think the answer is 16 seconds                                                        
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Is it possible for an exponential equation to have no solutions? If so, give an example. If not, explain why.
vredina [299]
A function f(x) has solutions if we can find a value to plug in that leads to 0. In other words, there are solutions to f(x) = 0. Another term for "solution" is "root" or "x intercept"

An exponential function may cross the x axis at one point only. Though there are plenty of cases when there are no solutions at all. For instance, in the case of f(x) = (2^x) + 10

The right hand side will never be equal to zero no matter what you plug in for x. The graph will never cross the axis.

To answer your question, yes it is possible to have an exponential equation to have no solutions. 
4 0
3 years ago
A bag contains 4 white, 3 blue, and 3 red marbles. Find the probability of choosing a red marble, then a white marble if the mar
scZoUnD [109]

Answer: 2 / 15

Step-by-step explanation:

3 red / 10 total

4 white / 9 total

3/10 * 4/9 = 12/90 = 2/15

5 0
3 years ago
Tony earns $200 per week 5 dollars for every magazine subscription that she sells how much in dollars will she earn in a week in
valina [46]
The equation is 200+ 5s=x
x= how much she makes every week 
4 0
3 years ago
the ratio of isabella money to shane money is 3:11 if isabella has 33$ how much money do shane and isabella have together use di
Liono4ka [1.6K]
Together both shane and isabella have 42$

8 0
4 years ago
Which is the simplified form of the expression?
Anon25 [30]

Given:

Consider the given expression is:

10n-\dfrac{1}{3}(9n-12)

To find:

The simplified form of the given expression.

Solution:

We have,

10n-\dfrac{1}{3}(9n-12)

Using distributive property, it can be written as:

=10n-\dfrac{1}{3}(9n)-\dfrac{1}{3}(-12)

=10n-3n+4

=7n+4

Therefore, the correct option is A.

4 0
3 years ago
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