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NemiM [27]
3 years ago
15

A penny is dropped from the observation deck at the top of The Willis Tower in Chicago, IL. The height of the penny at any time

is given by the equation H = 1450 – 16t2, where H is the height of the penny in feet and t is the time measured in seconds. How long will it take for the penny to hit the ground? Round your answer to the hundredths place.
Mathematics
1 answer:
Juliette [100K]3 years ago
7 0

Answer:B

Step-by-step explanation:because you need to add

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Among all the rectangles whose perimeters are 100 feet, find the dimensions of the one with the maximum area. explain step by st
kompoz [17]
<span>We let x be the length and y be the width of the rectangle. Then,
 
Perimeter = 2x + 2y
100 = 2x + 2y
50 = x + y
y = 50 - x
 
Area = xy
A = x(50 - x)
A = 50x - x^2
 
We then take the derivative; set it equal to zero:
 
A ' = 50 - 2x
0 = 50 - 2x
2x = 50
x = 25
y = 50 - x
y = 50 - 25
y = 25
 
Therefore, the dimensions are 25 and 25.</span>
7 0
3 years ago
-5=-10+ find the missing value
liraira [26]

Answer:

the missing values is 5

I hope it's helps you to

7 0
3 years ago
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PLEASE NO LINKS AND NO NEGATIVITY
Sliva [168]
-4w+32
multiply using the distributive property
3 0
2 years ago
A scientist raised $32,506 for his project. He later found out that he would need $57,500 to completely pay for it. How much mor
hammer [34]
We need to subtract:  the scientist needed 57,500 dollars, but already had 32,506, so we need to find what's left: 57,500 - 32,506 = 24,992 dollars

Your answer is A.  Hope that helps! :)
3 0
3 years ago
Read 2 more answers
Analyze Corey’s work to find his error. What is Corey’s mistake? He substituted 80 for x instead of y. He should have added 88.2
Anni [7]

x is the temperature and y is the number of swimmers. If there are 80 swimmers, then y = 80 instead of x = 80

This is how Corey should have solved

y = 1.505*x - 88.21

80 = 1.505*x - 88.21 <--- replace y with 80

1.505*x - 88.21 = 80

1.505*x = 80 + 88.21 <--- add 88.21 to both sides

1.505*x = 168.21

x = 168.21/1.505 <--- divide both sides by 1.505

x = 111.767

x = 111.8

If there are 80 swimmers at the pool, then the possible outside temperature is roughly 111.8 degrees F. This temperature seems awfully large, so it's possible that Corey's regression equation has limited scope; in other words, it isn't too useful if x is outside a given interval

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3 years ago
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