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Bingel [31]
3 years ago
10

A ball is thrown from ground level straight up into the air at an intitial velocity of 54 feet per second. The height of the bal

l t seconds after it is thrown is given by the formula h(t)=54t-16’2. How many seconds after the ball is thrown will it return to the ground
Mathematics
1 answer:
bonufazy [111]3 years ago
3 0

Answer:

3 3/8 seconds.

Step-by-step explanation:

When it reaches the ground h = 0 so:

54t - 16t^2 = 0

16t^2 - 54t = 0

2t(8t - 27) = 0

t = 0 or t =  27/8   (we ignore the t = 0 ) so:

t =   3 3/8 seconds.

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step by step explanation:
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Answer:

x=9

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Based on a poll, 40% of adults believe in reincarnation. Assume that 8 adults are randomly selected, and find the indicated prob
Veronika [31]

Answer:

The probability under the given conditions is found:

P(7) = 0.079

Step-by-step explanation:

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x follows binomial distribution:

P(x) =  \left(\begin{array}{ccc}n\\x\end{array}\right) (p)^x(1-p)^{n-x}

where

n= total people random people selected = 8,

x = selected for the part = 7,

p = probability given = 0.4

P(7) = \left(\begin{array}{ccc}8\\7\end{array}\right) (0.4)^7(1-0.4)^{8-7}

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Rounding off to 3 decimal positions

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8 0
3 years ago
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Dimas [21]

Answer:

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Hope this helps!

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4 years ago
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