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Alexus [3.1K]
1 year ago
10

a certain bridge is 4,024 feet long. approximately how many minutes does it take to cross this bridge at a constant speed of 20

miles per hour?
Mathematics
1 answer:
Taya2010 [7]1 year ago
3 0

It take 2 minutes to cross this bridge at a constant speed of 20 miles per hour.

<h3>What is unitary method?</h3>

The unitary method is a method for figuring out a single unit's value, then multiplying that value by itself to get the required value. An individual or singular unit is referred to as unitary. Because of this, the goal of this method is to determine values in reference to a single unit. The unitary technique can be used, for instance, to determine how many kilometers a car can go on one litre of gas if it can travel 44 km on two litres of gas. A single unit's value is determined using the unitary approach, and the value of the necessary number of units can then be determined using this value.

To know more about unitary method ,visit:

brainly.com/question/28276953

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Lemur [1.5K]

Answer:

2(8 x 4) + 2(4 x 10) + 2(8 x 10)

Step-by-step explanation:

the expression represents the surface area, because it is finding the area of the three different sizes of sides, doubling them, then adding them together

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Find the value of a1 for an infinite geometric series with S=12 and r=1/6
blondinia [14]
S_n=a(1+r+\cdots+r^{n-1}+r^n)
rS_n=a(r+r^2+\cdots+r^n+r^{n+1})
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When |r|, we have

\displaystyle\lim_{n\to\infty}S_n=\dfrac a{1-r}

as is the case here. Since S=\lim\limits_{n\to\infty}S_n=12 and r=\dfrac16 are given, we can find the first term a immediately:

12=\dfrac a{1-\frac16}\implies12=\dfrac65a\implies a=10
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3 years ago
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Step-by-step explanation:

We can define z = 3^(x/10). Then the equation is quadratic, which we can solve by completing the square. X can be found from the positive solution for z.

  z^2+\dfrac{1}{3}z=84\\\\z^2+\dfrac{1}{3}z+\dfrac{1}{36}=84\dfrac{1}{36}\\\\(z+\dfrac{1}{6})^2=(9\dfrac{1}{6})^2\\\\z=9\dfrac{1}{6}-\dfrac{1}{6}=9\\\\z=3^{\frac{x}{10}}=3^2\\\\x=10\cdot2\\\\\boxed{x=20}

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Answer:

how is your mom doing tell her last night was crazy :D

Step-by-step explanation:

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