Write an equation in slope-intercept form for

I meant is -99 rational or irrational?

otez555 [7]

Answer:

rational

Step-by-step explanation:

irrational number is number with infinite number behind the dot

ex: 1.111111111111....1111....1111(infinite number 1) is irraltional number

5 0

3 years ago

Read 2 more answers

What is the sound level for a noise that has an intensity of 9.9 × 10-5 watts/m2?

horsena [70]

Given: Sound Intensity ( I ) = $9.9 \times 10^{-5}\frac{watts}{m^2}$

We know, the approximate threshold of human hearing is at 1kHz. In watts/m^2 it's value is $=\frac{9.9 \times 10^{-5}}{10^{-12}}$ ⁻¹² W/m².

So, we can say, Reference sound intensity $(I_0)$ = 10⁻¹² W/m².

We have formula for "sound intensity level LI in dB" when entering sound intensity.

LI = 10×log (I / Io) in dB

Plugging values of I and Io in formula.

LI = 10 × log ( $\frac{9.9 \times 10^{-5}}{10^{-12}}$ )

LI = 10 × log (99000000)

= 10 × 7.99564

LI = 79.96 dB.

Therefore, 79.96 dB is the sound level for a noise that has an intensity of 9.9 × 10-5 watts/m2.

8 0

3 years ago

THIS IS A MULTI STEP LINEAR EQUATIONS PROBLEM.

Vesna [10]

Answer:

HIS IS A MULTI STEP LINEAR EQUATIONS PROBLEM.

A family is deciding on which cell carrier to switch to. They have the exact same services. Option one is ATTEL. They have a flat fee of 20 per month, and an extra $5.50 per GB. The second option is PACBEL. They have a plan that charges nothing per month, but they charge $6 per GB. Use the chart below to create a system of equations and solve

Step-by-step explanation:divided by 2

6 0

3 years ago

Which of the following lines goes downwards to the left to right?

alexandr402 [8]

<span>y = mx + b ; where m=slope of the line. You want the slope to go downhill from left to right, that would mean that m = (-)...

so the answer is D</span>

8 0

3 years ago

A school was attempting to determine the proportion of students who have access to the internet in their homes. Demographic data

Likurg_2 [28]

Answer:

Z = -1.789

P value = 0.036807

Step-by-step explanation:

Here

H0: p = 0.85 students will have access to the internet at home

Ha: p < 0.85 students will have access to the internet at home

As per the given data, out of 120 sampled students, 95 have access to internet at home

This is 79.17 % of the total number of sampled students.

The Z values is given by

$Z = \frac{p-p'}{\sqrt{\frac{p(1-p)}{n} } }$

Substituting the given values, we get -

$Z = \frac{0.7917-0.85}{\sqrt{\frac{0.85(1-0.85)}{120} } }\\Z = -1.789$

The sample proportion of 0.7917 is about -1.789 standard errors below the population proportion given in the null hypothesis.

Considering, result is significant at p < .05, the P-Value is .036807.

3 0

3 years ago