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3 years ago

7

4-7 Please! This is about scientific experiments.

1 answer:

ladessa [460]3 years ago

8 0

Number 4 is c , number 5 is a , number 6 is d and 7 is a

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The line models the cost of renting a bike. It costs $3 per hour plus a $4 deposit. Write an equation in slope-intercept form

skad [1K]

Answer:

y=($3/1h)x+$4, it costs $19 to rent the bike for 5 hours.

Explanation:

An equation in slope-intercept form is y=m*x+n. In this case y would be the cost of rent, while x is the time. We need to determine m and n.

At the very beginning, x=0h (h is hours), the cost of rent is the deposit, so we know that $4=m*0h+n=n. Then we know that the cost of rent must increase by $3 with each hour, which means that the slope is m=$3/1h. Another way of getting this value would be to think on a particular case: after 1 hour, the cost of rent should be the deposit plus an hour of rent, or $7, so it should happen that <em>$7</em>=m*<em>1h</em>+$4 (where the $4 we already know is the value of n, and the numbers in italics are the values for the particular case we are looking for), from where we get that m*1h=$3, so m=$3/1h (the same result as before).

Putting all together, we have y=($3/1h)x+$4, and for 5 hours we get y=($3/1h)(5h)+$4

4 0

4 years ago

Vector A has a magnitude of 4.0m and points 30 south of east vector B has a magnitude of 2.0m and points 30 north of west the re

valentina_108 [34]

Answer:

2.06 m at 49.7 or 50 degree South of East

Explanation:

take x axis and y axis and follow as explained in attachment

6 0

3 years ago

A light source radiates 60.0 W of single-wavelength sinusoidal light uniformly in all directions. What is the average intensity

umka21 [38]

Answer: $29.85\ W/m^2$

Explanation:

Given

Power $P=60\ W$

Distance from the light source $r=0.4\ m$

Intensity is given by

$I=\dfrac{P}{4\pi r^2}$

Inserting values

$\Rightarrow I=\dfrac{60}{4\pi (0.4)^2}\\\\\Rightarrow I=\dfrac{60}{2.010}\\\\\Rightarrow I=29.85\ W/m^2$

3 0

3 years ago

Read 2 more answers

Two satellites are orbiting earth at different altitudes. Which satellite orbits at a higher speed v around earth?

aniked [119]

Answer:

Low satellite has high orbital velocity

Explanation:

let v be the orbital speed of the satellite orbiting at a height h is given by

$v=\sqrt{\frac{GM}{R+h}}$

where, M be the mass of planet, r be the radius of planet and h be the height of planet from the surface of planet.

here we observe that more be the height lesser be the orbital velocity.

So, a satellite which is at low height has high orbital velocity.

3 0

4 years ago

The orbital motion of Earth around the Sun leads to an observable parallax effect on the nearest stars. For each star listed, ca

Murrr4er [49]

Answer:

Following are the answer to this question:

Explanation:

Formula:

$D(PC) =\frac{1}{parallax}\\\\D(av)=D(PC) \times 20.626\ J$

Calculating point A:

when the value is $0.38$

$\to 0.38 \toD(PC)= \frac{1}{0.38}\\\\$

$=2.632$

$\to D(a.v) = \frac{1}{0.38} \times 206265\\$

$=542,802.6$

Calculating point B:

when the value is $0.75$

$\to D(PC)=\frac{1}{0.75}$

$=1.33$

$\to D(a.v) = \frac{1}{0.75} \times 206265\\$

$=275,020$

Calculating point C:

when the value is $0.28$

$\to D(PC)=\frac{1}{0.28}$

$=3.571$

$\to D(a.v) = \frac{1}{0.28} \times 206265\\$

$=736660.7$

Calculating point D:

when the value is $0.42$

$\to D(PC)=\frac{1}{0.42}$

$=2.38$

$\to D(a.v) = \frac{1}{0.42} \times 206265\\$

$=490910.7$

Calculating point E:

when the value is $0.31$

$\to D(PC)=\frac{1}{0.31}$

$=3.226$

$\to D(a.v) = \frac{1}{0.31} \times 206265\\$

$=665370.97$

6 0

3 years ago