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Ede4ka [16]
3 years ago
9

Using the formula D= r•t where D equals distance traveled, r equals the average rate of speed and t equals the time traveled, ch

oose the expression or equation that correctly represents this information. Sam drove 200 at an average rate of speed of 50 miles per hour. How long did he travel?
Mathematics
1 answer:
Mrrafil [7]3 years ago
4 0
D = r• t
reverses the equation so that D and r are on the same side
d/r = t
200 \div 50 = 4
Sam travels 4 hours at a rate of 50 mph
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The answer is 18 cm.

Step-by-step explanation:

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Solve the equation. Round to the nearest hundredth. Show work.
Burka [1]

Answer:

x=-0.75

Step-by-step explanation:

The given equation is

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3 0
3 years ago
What is the volume of the triangular prism to the nearest whole unit?
kari74 [83]
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8 0
3 years ago
a truck is rented at 40$ per day plus a charge per mile use. The truck traveled 15 miles in one day, and the total charge was 11
Alla [95]

Answer:

15x + 40 = 115

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5 0
3 years ago
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tankabanditka [31]

Answer:

1.778 times more or 16/9 times more

Step-by-step explanation:

Given:

- Mirror 1: D_1 = 8''

- Mirror 2: D_2 = 6"

Find:

Compare the light gathering power of an 8" primary mirror with a 6" primary mirror. The 8" mirror has how much light gathering power?

Solution:

- The light gathering power of a mirror (LGP) is proportional to the Area of the objects:

                                           LGP ∝ A

- Whereas, Area is proportional to the squared of the diameter i.e an area of a circle:

                                           A ∝ D^2

- Hence,                              LGP ∝ D^2

- Now compare the two diameters given:

                                           LGP_1 ∝ (D_1)^2

                                           LGP ∝ (D_2)^2

- Take a ratio of both:

                           LGP_1/LGP_2 ∝ (D_1)^2 / (D_2)^2

- Plug in the values:

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- Compute:             LGP_1/LGP_2 ∝ 16/9 ≅ 1.778 times more

6 0
3 years ago
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