The equation s =square root 30fd can be used to find the car's speed s in mph given the length d in feet of a skid mark and the friction factor f of the road. Police measured a skid mark of 90 feet on a dry concrete road. If the speed limit is 35mph, was the car speeding? Explain

Answers

Answer 1

Answer:

Yes, the car was speeding the speed limit.

Step-by-step explanation:

The given equation to find the car's speed, s (in mph), is

[tex]s=\sqrt{30fd}[/tex]

where, d is the length of the skid and f is the friction factor.

Police measured a skid mark of 90 feet, so d=90

As the road is dry and of concrete, therefore the friction factor, f=0.8.

So, the speed of the car

[tex]s=\sqrt{30\times0.8\times90} = 46.48[/tex] mph

The speed of the car is 46.48 mph which is more than the speed limit of 35 mph.

Hence, the car was speeding the speed limit.


Related Questions

what 8 divieded by -7

Answers

Answer:

-1.14285714286

Step-by-step explanation:

brainlist plz thx

Answer:-1.14285714286Step-by-step explanation:

If you divided 8÷-7 the result will be -1.14285714286 is negative because when you divide a positive number with a negative alway is going to be a negative.

And if you simplify it gives you

-1.143.

I think thats it. sorry if im wrong.

HELP ME PLS OMG -LS PLS PLS PLS ASAP ASAP PLS pls

Answers

Answer:

No, Yes, Yes

Step-by-step explanation:

no yes yes

(gl on your test or whatever)

HELP!!! I HAVE 2 MINUTES!!!!
What is the solution set for (x+1)^2−13=36?
A.{–6, 6}
B.{–8, 6}
C.{–6, 8}
D.{–7, 5}

Answers

it is B because when u graph the equation the solution set becomes visible that it is -8,6

Please help omg please:( just please I don’t wanna fail

Answers

Answer:

use the app called socratic

Step-by-step explanation:

Write the slope-intercept form of the equation of each line given the slope and y-intercept.
1) Slope = 6, y-intercept = 5

2) Slope = -1/3, y-intercept = 1

Answers

Answer:

1.) y= 6x+5

2.) y= -1/3x+1

Step-by-step explanation:

Slope Intercept Form is y=mx+b,

where slope is m

the y-intercept is b

So I just plugged in the slope and y-int to get the equation

11.) The table shows four account transactions. Find the account balance after all the
account transactions if the account started at zero.
deposit $35
deposit
$25
withdrawal -$50
withdrawal -$25

Answers

Answer:

-15

Step-by-step explanation:

35+25=60

60-50=10

10-25=-15

What is the value of the expression
?
(2-4)2

Answers

Answer:

-4

Step-by-step explanation:

2 - 4 = -2

-2 multiplied by 2 is -4

Hope I helped :)

Please consider Brainliest :)

You Start At (4,-2) You Move Left 1 Unit And Up 1 Unit. Where Do You End?

Answers

If you move left 1 unit and up 1 unit then you will end at (3,-1)

Answer:

(3,-1)

Step-by-step explanation:

this is because you have to use the equation [tex]y=-1x+2[/tex] which will bring you from (4,-2) to (3,-1)

2x4 – 5x3 + 2x2 + 5x - 10
x - 2

Answers

answer  97

Step-by-step explanation:

2x4 – 5x3 + 2x2 + 5x - 10

x - 2 = 97

During a charity drive, the senior class raised $85 more than twice the amount raised by the freshman class. The senior class raised $555. How much did the freshman class raise?

Answers

Answer:

235$

Step-by-step explanation:

85+2x=555

-85         -85

      2x=470

2x/2x     460/2x

235

so the freshman class raised 235$

Roxanne is measuring the diameter and the radius of different-sized circles.
There is a proportional relationship between the radius of the circle in inches, x, and the diameter of the circle in inches, y.
x (radius in inches) y (diameter in inches)
1 2
2 4
9 18
10 20
What is the constant of proportionality? Write your answer as a whole number or decimal.
inches in diameter per inch in radius

Answers

Answer:

2

Step-by-step explanation

I need help please, can you help me?

Answers

Answer:

x= 16 degrees

Step-by-step explanation:

the angles can be a little hard to remember but just know that the angles that are outside of the transversal are exterior angles and if they are on the opposite sides of the line that passes through the parallel lines then they're alternate exterior angles and those angles that are inside are interior angles and if they are on the opposite sides of the line passing through the parallel then they are alternate interior angles .

Point P' is the image of P(-2,4) under a translation by 2 units to the left and 5 units down.

Answers

Answer:

(-4,-1)

X value: -2 - 2 = -4.

Y value: 4 - 5 = -1

How is the expression 4^-2 written using a positive exponent

Answers

9514 1404 393

Answer:

  1/4^2

Step-by-step explanation:

The applicable rule of exponents is ...

  a^-b = 1/a^b

__

Then ...

  4^-2 = 1/4^2

Lionel Messi, who is running 20 feet per second is 15 feet behind Cristiano Ronaldo who is running at 17 feet per second. How long will it take Messi to catch up with Ronaldo?

Answers

Answer:

15 feet

Step-by-step explanation:

Answer:

15 feet

Step-by-step explanation:

Please Help!!!
Thanks!!!!!!

Answers

Answer:

I will say A because is the one that makes more sense and is actually the one that is discrimination the equation

. What are the slope and y-intercept of the line y = -6

Answers

Answer: Slope= undefined because it's just a straight line across and the Y intercept is -6 because thats where Y is at when X is 0

Yesterday, the snow was 2 feet deep in front of Archie’s house. Today, the snow depth dropped to 1.6 feet because the day is so warm. What is the percent change in the depth of the snow?
The percent change in the depth of snow from yesterday to today is
%

Answers

Answer:

20%

Step-by-step explanation:

2-1.6=0.4

0.4/2x 100

40/200=1/5 or 20%

The base of the triangular flag was 4ft and the height was 3 feet. What is the area of Karmas flag

Answers

Answer:

6 [tex]ft.^{2}[/tex]

Step-by-step explanation:

Use the triangle area equation

[tex]A=\frac{b*h}{2}[/tex]

plug in the base (4ft) times the height (3ft) then divide by two

Question 11
The area of a square is 108 ft. Which of the following represents the length of one side?
А
27 feet
B
54 feet
с
63feet
ОО
D
363feet

Answers

The answer is A, 27, since a square has congruent sides.

Mark brainliest?? I hoped this helped, btw! :D

12. ¿Que numero sumado por 40 da 0? 40 +
= 0 *​

Answers

Answer:

12. What number added by 40 gives 0? 40+

= 0 *

Step-by-step explanation:

I'm confused by what you mean lol is this what you wanted?

HOPE THIS HELPS!!

40+-40=0 porque si tienes 40 y le restas 40 te da 0

Jace is moving and must rent a truck. There is an initial charge for the rental plus a
fee per mile driven. Let C represent the total cost of renting the truck when the truck
is driven m miles. The table below has select values showing the linear relationship
between m and C. Determine the initial fee to rent the truck.

Answers

Answer:

$30

Step-by-step explanation:

Answer: 45

Step-by-step explanation:

To find how much money Jace would be charged if he drove 5 miles with the rented truck, we must plug in

5

5 for

m

m

X-3=19
solve for the variable X

please show your work

thx :)

Answers

X-3--19
3,6,9,12,15,18
And they don’t have a 19

Answer:

22

Step-by-step explanation:

x-3=19

 +3 +3

     =22 so there for x=22

how many times larger is the mass of an average grain of rock song than the mass of an average grain of table salt​

Answers

Answer:

40

Step-by-step explanation:

The sample answer for edmentum is: The first factor of the mass of an average grain of rock salt is 40 times the first factor of the mass of an average grain of table salt. So, the mass of an average grain of rock salt is 40 times greater than the mass of an average grain of table salt.

The mass of an average grain of rock sand is 43.4 times larger than the mass of an average grain of table salt

What is scale factor?

Scale factor is used to compare the size of two objects. Mathematically, we can write -

{K} = S{O1}/S{O2}

13 mg

Given is to compare the mass of an average grain of rock sand than the mass of an average grain of table salt​.

The mass of an average grain of rock sand is : 13 mg

The mass of an average grain of table salt is : 0.3 mg

So, we can write that -

{K} = M{rock sand}/M{table salt}

{K} = 13/0.3

{K} = 130/3

{K} = 43.4

So, it can be concluded that the mass of an average grain of rock sand is 43.4 times larger than the mass of an average grain of table salt.

Therefore, the mass of an average grain of rock sand is 43.4 times larger than the mass of an average grain of table salt.

To solve more questions on size comparison, visit the link-

https://brainly.com/question/30526199

#SPJ7

Can y’all please help me

Answers

Answer:

noi cant

Step-by-step explanation:

im too dumb for this

try to steal points and i ll report you and get you banned
but if you tried your ok

Answers

Answer:

x =8x = 11x = 12x = -3x = -9

Step-by-step explanation:

just go in order like I put them and they are all right

start form -5x+6(4x+15)=242 which would be number 1 x = 8

Okay hope this helps oh could you mark this Brainliest please

Hi please answer??????

Answers

Answer:

All rational numbers are real,

Answer:

False

Step-by-step explanation:

This is because all non terminating numbers are not rational because they a non terminating number may non repeating which means it may not be able to go in p/q form, hence, NOT ALL NON TERMINATING NUMBERS ARE RATIOANL, BUT FEW ARE.

If my answer helped, kindly mark me as the brainliest !!

Thanks!!

Help please I’m so confused I’ll mark you brainless

Answers

Answer:

no they are not equivalent

Step-by-step explanation:

n (4n^2-1)

4n^3-n

basically you need to multiply 2n+1 and 2n-1 to get (4n^2-1) and then multiply n. in the ends. they arent equivalent

If I have a Positive and a positive, what will the answer be?

Answers

Positive plus positive equals positive negative plus negitive equals negitive

Answer and Step-by-step explanation:

If you were to add two positives together, the result will be positive.

If you were to multiply two positives together, the result is positive.

If you were to divide two positives together, the result is positive.

If you were to subtract two positives together, then it depends;

If the smaller positive number was being subtracted by the bigger positive number, then the result is negative.

If the bigger positive number is being subtracted by the smaller positive number, then the result is positive.

#teamtrees #PAW (Plant And Water)

Bank customer has came to the limit of her free monthly transactions will
be charged $1.50 for each additional transaction. If she buys groceries for $139.86,
gas for $51.95, and two movie tickets for $26.00 on her bank card, what will the total
deducted from her account be? Show work.

Answers

Answer: The total deducted from her account with be $220.81

Step-by-step explanation: Just add them all together adding $1.50 after each on

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