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pashok25 [27]
3 years ago
13

Michael timed a train using a clock. the train traveled a distance of half mile from t = 10 seconds to t = 55 seconds. what was

the speed of the train in feet per second? (round answer to nearest tenth).
Mathematics
1 answer:
Alekssandra [29.7K]3 years ago
3 0

Answer:

<em>58.7 ft/sec</em>

Step-by-step explanation:

The train traveled half a mile.

1 mile = 5280 ft

0.5 mile = 0.5 * 5280 ft = 2640 ft

A time from 10 sec to 55 sec is 55 sec - 10 sec = 45 seconds.

2640 ft in 45 seconds

speed = distance/time

speed = 2640 ft / 45 sec = 58.6666... ft/sec

Answer: speed = 58.7 ft/sec

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Which of the following is NOT a formula for determining complementary probability?
forsale [732]

<em>Question:</em>

<em>Which of the following is NOT a formula for determining complementary probability?</em>

<em>A. P(outcome) = 1- P(-outcome)</em>

<em>B. P(outcome) - P(-outcome) = 1</em>

<em>C. P(outcome) + P(-outcome) =1</em>

<em>D. P(-outcome) = 1 - P(outcome)​</em>

<em></em>

Answer:

P(outcome) - P(-outcome) = 1

Step-by-step explanation:

Required

Determine which option is not a formula of complementary probabilities

From the list of given options, the complementary probabilities are P(outcome) and P(-outcome)

In probability;

P(outcome) + P(-outcome) = 1 --- Equation 1

Subtract P(outcome) from both sides

P(outcome) - P(outcome) + P(outcome) = 1 -  P(outcome)

P(-outcome) = 1 - P(outcome)  ------ Equation 2

Subtract P(-outcome) from both sides of equation 1

P(outcome) + P(-outcome) - P(-outcome) = 1 -  P(-outcome)

P(outcome)  = 1 -  P(-outcome)

Equation 1, 2 and 3 represents options A, C and D

While option B is out of place

<em>Hence, option B is not a formula of complementary probability</em>

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Answer:

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Step-by-step explanation:

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