1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
schepotkina [342]
3 years ago
6

The stopping distance of a car is modeled by the function d = 0.05r(r + 2) where d is the stopping distance of the car measured

in feet and r is the speed of the car in miles per hour. If skid marks left on the road are 75 feet long, how fast was the car traveling?
Mathematics
1 answer:
adell [148]3 years ago
3 0

Answer:

The car was moving approximately at a speed of 37.74 miles per hour.

Step-by-step explanation:

We are given the following in the question:

The stopping distance of a car is given by

d = 0.05r(r + 2)

where d is the stopping distance in feet and r is speed of the car in miles per hour.

The stopping distance is 75 feet, we have to find the speed of the car,

Putting d = 75 in the equation, we get,

75 = 0.05r(r + 2)\\r^2 + 2r = 1500\\r^2 + 2r-1500 = 0\\\\r =\dfrac{-2\pm \sqrt{4-(4)(1)(-1500)}}{2}\\\\r\approx -39.74,37.74

Thus, the car was moving approximately at a speed of 37.74 miles per hour.

You might be interested in
If one man can complete a work in 85/7days. In how many days 5 men can<br> finish this work?
Pepsi [2]

Answer:

17/7 days will be the answer

Step-by-step explanation:

7 0
3 years ago
Can someone please help me with math.
tensa zangetsu [6.8K]
I think is A or c for number 2 and number 1 A or d I am not sure
8 0
3 years ago
One angle of a right triangle measures 8°. What is the measure of the other acute angle?
Ivahew [28]

Answer:

  82°

Step-by-step explanation:

The acute angles in a right triangle are complementary. The other one is ...

  90° -8° = 82°

5 0
2 years ago
Measure of Angle 1 is 5x.<br> Measure of Angle 3 is x-24.<br><br> What is the measure of Angle 1?
olga55 [171]

Answer:

The answer to your question is:  30°

Step-by-step explanation:

Data

m∠ 1 = 5x

m∠ 3 = x - 24

Process

m ∠ 1 = m ∠ 3 because they are vertical angles

            5x = x - 24

            5x - x = 24

            4x = 24

            x = 24 / 4

            x = 6

Angle 1 = 5(6)

            = 30°

4 0
3 years ago
Traingle BUG has measurements as shown below.
Harrizon [31]

Answer:

48*52=2496/2=1248

Step-by-step explanation:

Triangle syprine=b*h/2

16*14=224/2=112

answer b is the most similar:48*52=2496/2=1248

48 is 3x>16

4 0
3 years ago
Other questions:
  • 3/5 of a fence was installed in 1 1/2 days. how many days to install the whole fence?
    11·2 answers
  • Which statement is true about the product 3(7square root of 4 + 2square root of 9? It is rational and equal to 60. It is rationa
    15·1 answer
  • Susie ran a race. She ran 55 miles an hour, and the race took her tt hours to complete. How long was the race?
    10·1 answer
  • What is the resistance in a circuit when the current is 0.5 ampere? Ohms​
    15·1 answer
  • Please help! (Picture shown)
    5·1 answer
  • Find the intersection of H and G find the union of H and G
    5·1 answer
  • Where do fractions go on a number line
    7·1 answer
  • Which equation represents the situation? A university charges a $100 application fee and $720 per month tuition
    9·1 answer
  • PLZ HELPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP
    10·1 answer
  • Hey guys i need help
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!