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3 years ago

0.9 over 100 is what and show proof

1 answer:

7 0

Multiply the numerator and the denominator by 10. That's fine, because 10/10 is one and we are keeping the value the same. the answer is 9/1000

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Please help me with question 19

Ksenya-84 [330]

Alright, lets get started.

Suppose the smaller integer = n

So, larger integer will be = n+2

3 times of larger integer will be = $3(n+2)$

smaller integer is added into this , so

$n +3 (n+2)$

The result is 2 less than 5 times of smaller integer, so

$5n - 2$

Both are equal so,

$n + 3 (n+2) = 5n - 2$

$n + 3n + 6 = 5n - 2$

Rafael makde the mistake that he didn't put the larger integer into parenthesis like (n+2) , so three times will be 3 n + 6 as he got 3n + 2

So, the correct equation is

$n +3n +6 = 5n - 2$

Solving the equation

$4n + 6 = 5n - 2$

$n = 8$

So, saller integer is 8 and larger integer is $8 + 2 = 10$

So, both integers are 8 and 10. : Answer

Hope it will help :)

8 0

3 years ago

Problem PageQuestion Calcium levels in people are normally distributed with a mean of mg/dL and a standard deviation of mg/dL. I

SIZIF [17.4K]

Complete Question

The complete question is shown on the first uploaded image

Answer:

The calcium level that is the borderline between low calcium levels and those not considered low is $c = 8.68$

Step-by-step explanation:

From the question we are told that

The mean is $\mu = 9.5\ mg/dL$

The standard deviation $\sigma = 0.5 \ mg/dL$

The proportion of the population with low calcium level is $p =$ 5% = 0.05

Let X be a X random calcium level

Now the P(X < c) = 0.05

Here P denotes probability

c is population with calcium level at the borderline

Since the calcium level is normally distributed the z-value is evaluated as

$P(Z < \frac{c - \mu}{\sigma } ) = 0.05$

The critical value for 0.05 from the standard normal distribution table is

$t_{0.05} = -1.645$

=> $\frac{c - \mu}{\sigma } = -1.645$

substituting values

$\frac{c - 9.5}{0.5 } = -1.645$

=> $c - 9.5 = -0.8225$

=> $c = 8.68$

6 0

4 years ago

Ama Maria walks 9 miles in 3 hours. How many miles does she walk per hour?

Ludmilka [50]

Ana maria walks 3 miles per hour

3 0

3 years ago

Read 2 more answers

I need help with number 10.

Ksenya-84 [330]

Answer:

5% commission

Step-by-step explanation:

8 0

3 years ago

Question is attached, Don't worry explaining too much just make sure the answer is correct :))

garik1379 [7]

Answer:

The image below will explain the question

To figure out the length of portion BC, we will use the trigonometric ratio below

$\begin{gathered} \sin\theta=\frac{opposite}{hypotenus} \\ oppsite=BC \\ hypotenus=8in \\ \theta=35 \end{gathered}$

By substituting the values, we will have

$\begin{gathered} \sin(\theta)=\frac{oppos\imaginaryI te}{hypotenus} \\ \sin35=\frac{BC}{8} \\ cross\text{ multiply, we will have} \\ BC=8\sin35 \end{gathered}$

Hence,

The final answer is

$\Rightarrow8\sin35^0$

The FOURTH OPTION is the right answer

8 0

1 year ago