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3 years ago

5

Vinay made a password that consists of 3 digits. none of the digits are the same. how many possible passwords did vinay choose f

rom?

2 answers:

zhuklara [117]3 years ago

5 0

Assuming the possible digits are from 0-9, there are 10*9*8 possibilities which come out to 720

In-s [12.5K]3 years ago

4 0

Assuming a 3-digit password can begin with a zero, the answer is 720. X
Hope it helps

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How do I solve question 5?

Nezavi [6.7K]

A) x^2 + y^2 = 80
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What is x^2 -y^2?
B) x * y = 12
So y = 12 / x
A) x^2 + (12/x)^2 = 80
x^2 + (12/x)^2 = 80
x^2 + (144/x^2) = 80
Multiplying each side by x^2
x^4 + 144 = 80x^2
x^4 -80x^2 + 144 = 0
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Y = <span> <span> <span> 8.85608</span></span></span> (found by trial and error)

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3 years ago

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Kelan shaded 0.5 of the rectangle what fraction equals 0.5

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Maria's height while jumping on a a trampoline can be modeled by the equation h=-16t^2+18t+5. Where t=time in seconds and h=heig

Vadim26 [7]

Answer:

10.06 ft

Step-by-step explanation:

Maria's maximum height will occur when her velocity reaches zero (0). This means that she has stopped ascending and is about to begin descent.

The equation for the height reached by Maria on the trampoline is given as:

$h=-16t^2+18t+5$

To find her maximum height, we first have to find the time it will take her to get to that height and corresponding velocity (zero).

Her velocity can be found by differentiating her height i.e. dh/dt:

$v = \frac{dh}{dt} = -32t + 18$

Therefore, when v = 0:

$0 = -32t+ 18\\\\=> 32t= 18\\\\t = 18 / 32 = 0.5625 secs$

It takes her 0.5625 seconds to get to her maximum height.

Therefore, her height at that time (0.5625 seconds) is:

$h=-16(0.5625)^2+18(0.5625)+5\\\\h = -16 * (0.3164) + 10.125+5\\\\h = -5.0624 + 15.125\\\\h = 10.06 ft$

Therefore, her maximum height is 10.06 ft.

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3 years ago