Please help . I’ll mark you as brainliest if correct

What is 87.4 and 9.6 rounded to the nearest estimated whole number

Sveta_85 [38]

87.4 would be rounded to 87.
9.6 would be rounded to 10.
Please vote my answer brainliest! Thanks.

5 0

4 years ago

Read 2 more answers

Your round-trip drive to work is 4 io miles. How many miles do you drive to and from

jek_recluse [69]

Answer:

12

Step-by-step explanation:

4 miles a day for three days

3*4=12

12 miles

5 0

4 years ago

1. At a computer manufacturing company, the actual size of a computer chip is normally distributed with a mean of 1 cm and a sta

liraira [26]

Answer:

The 4 answers are given below:

0.1cm, 0.1 probability, 0.25 probability, 1.095cm

Step-by-step explanation:

QUESTION HEAD: At a computer manufacturing company, the actual size of a computer chip is normally distributed with a mean of 1cm and standard deviation of 0.1cm. A random sample of 12 computer chips is taken.

(A) What is the standard error for the sample mean?

(B) What is the probability that the sample mean will be between 0.99 and 1.01cm?

(C) What is the probability that the sample mean will be below 0.95cm?

(D) Above what value do 2.5% of the sample means fall?

ANSWERS:

(A) The standard error for the sample mean is 0.1cm

(B) [0.99, 1.01]cm?

The mean length is 1cm and S.E. is 0.1cm, hence all lengths fall into the following range: [0.9 - 1.1]

0.99 - 0.9 = 0.09

1.1 - 1.01 = 0.09

0.09 + 0.09 = 0.18

1.1 - 0.9 = 0.2

0.2 - 0.18 = 0.02 This is the fraction of 0.2 that the length bracket in the question occupies. So 0.02/0.2 = 0.1

Hence the probability that the sample mean will be between 0.99 and 1.01cm is 0.1 (which translates to a 10% probability/chance)

(C) The probability that the sample mean will be below 0.95 is:

0.95 - 0.9 = 0.05

0.05/0.2 = 0.25 (which translates to a 25% chance of occurrence)

(D) Above what value do 2.5% of the sample means fall?

Here, you're looking for the value of the mean which serves as the lower limit for the top 2.5% of sample mean values.

2.5% of 0.2 = 0.025 × 0.2 = 0.005

Subtract this from the highest possible mean value:

1.1 - 0.005 = 1.095

So, above 1.095 is where 2.5% of the sample means fall

3 0

3 years ago

What is 358 rounded to

Helga [31]

The answer to your question is 360

7 0

3 years ago

The funcilon f(x) = -(x + 5)(x +

Arte-miy333 [17]

Answer:

all numbers less than or equal to $-3$ .

Step-by-step explanation:

The original equation shown is in "root form", a form of a quadratic equation showing where it hits the $x$ -axis. This form does not show, like a "standard form" quadratic equation does, the vertex of the quadratic. The standard form equation is shown below.

$ax^2+bx+c$

$a$ is a constant showing the vertical stretch or compression of the quadratic. Also it can show if the function is flipped based on if it has a negative symbol at the front.
$b$ isn't very important when graphing unless you want to convert the equation to root-form.
$c$ is the height of the vertex. This is very important to know for this question because the vertex is either the minimum or maximum of the quadratic.

If we want to solve this equation showing all our work, the best bet is converting our equation from root-form to standard-form, like so:

$f(x)=-(x+5)(x+1)$

distribute $x$ and $5$ into $(x+1)$ . Then take this and distribute the negative sign.

$f(x)=-x^2-5x-x-5\\f(x)=-x^2-6x-5$

This is our standard-form of the quadratic. Now we just need to determine the range of $y$ values it has.
<em>Note: The answers are wrong based on the $c$ value I have for this equation, so I'm going to just give the answer closest to this one.</em>

Based on the properties of a standard form equation I gave earlier, this equation will look like an upside down "U" with a maximum value of $-5$ . Therefore (based on the <em>italicized </em>text above), the range of $y$ values for this equation must be "all real numbers less than or equal to $-3$ ".

P.S: Message me with any questions or fixes I should make to my math.

7 0

3 years ago