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zimovet [89]
3 years ago
12

At 2063 ft, the KVLY-TV tower in North Dakota is the world’s tallest supported tower. How long would it take an object to fall f

reely from the top?
Mathematics
1 answer:
IgorLugansk [536]3 years ago
8 0
Use the equation of motion under gravity:-

s =  16t^2    where s is the distance and t = time

2063 = 16t^2

t^2 = 2063 / 16 =  128.94 s

t = sqrt 128.94  =  11. 4 seconds to the nearest tenth of a second

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Sinx cosx tanx=1-cos^2x
Marizza181 [45]
Tan x = sin x/ cos x. Cos x cancels. Sin^2 x =1-cos^2 x (standard trig identity) 
5 0
3 years ago
Help please <br><br> What is the value of b?
Marizza181 [45]

Answer:

3\sqrt{13}

Step-by-step explanation:

Find 'c' first by using the Altitutude Rule:

4/c = c/9

cross-multiply to get:

c = \sqrt{36} or 6

Now you can find 'a' by using the Pythagorean Theorem:

4² + 6² = a²

a = \sqrt{52}

Now you can find 'b' by using the Pythagorean Theorem:

(\sqrt{52})² + b² = (9+4)²

52 + b² = 169

b² = \sqrt{117}

b = \sqrt{117} = \sqrt{3}\sqrt{3}\sqrt{13}

b = 3\sqrt{13}

5 0
3 years ago
A store sells small notebook for $7 and large notebook for $10. If a student buys 6 nb and spends $54, how many of each size did
fgiga [73]

4 large note books and 2 small note books

7 0
3 years ago
Tonya bought gifts for her family that cost $25, $14, $33, and $19. She has to buy one more gift and wants her mean cost to be $
Brums [2.3K]

____________________________________________________

Answer:

Your answer would be $34.

____________________________________________________

Step-by-step explanation:

In order to get the mean cost that she wants from the gift, we would need to get the numbers that we already had, and have another set of row with the amount of gifts she needs with the mean she wants.

Here is how it should look like:

$25  $14  $33  $19    x

$25  $25  $25  $25 $25

We are trying to find the number for "x"

Therefore, we would need to use the process of adding, then subtracting after.

Lets add:

25+14+33+19=91\\\\25+25+25+25+25=125

What we would do now is subtract the numbers in order to get the price that Tonya wants from her gift, if she buys another gift.

125-91=34

Tonya should spend $34 on her last gift.

$34 should be your FINAL answer

____________________________________________________

3 0
3 years ago
The population of Mathlandia in 1995 was 23,473 and was projected to grow at a rate of 12% per decade. Predict the population in
lbvjy [14]

Answer:

27,822

Step-by-step explanation:

Let

t-----> the time in decade

P----. the population

we know that

P=23.473(1+0.12)^{t}

we have

t=(2010-1995)/10=15/10=1.5\ decade

substitute

P=23.473(1.12)^{1.5}=27,822

8 0
3 years ago
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