Mathematics, 23.10.2020 15:50 DivineMemes420

Two construction elevators are starting at different heights on a building. The first is 130 feet high and is rising at a rate of 7 feet per minute. The second is 226 feet high and is descending at a rate of 5 feet per minute. How long will it take for them to be at the same height?

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Answer from: Arththika2002

It will take 8 minutes to be on same height.

Step-by-step explanation:

Let x= Time taken to be at same height.

The first is 130 feet high and is rising at a rate of 7 feet per minute.

Height = 130+7x

The second is 226 feet high and is descending at a rate of 5 feet per minute.

Height = 226-5x

According o the question,

$130+7x=226-5x\\\\\Rightarrow\ 7x+5x=226-130\\\\\Rightarrow\ 12x = 96\\\\\Rightarrow\ x=\dfrac{96}{12}\\\\\Rightarrow\ x=8$

Hence, it will take 8 minutes to be on same height.

Answer from: Quest

2/5

step-by-step explanation:

Answer from: Quest

step-by-step explanation:

i found the life tables for the year 2012.

life table of males at age 30. probability of dying between ages x and x+1

total population:

29–30 . . . . . . . . . . . . 0.001030

30–31 . . . . . . . . . . . . 0.001061

males:

29–30 . . . . . . . . . . . . 0.001420

30–31 . . . . . . . . . . . . 0.001448

white population

29–30 . . . . . . . . . . . . 0.001005

30–31 . . . . . . . . . . . . 0.001037

white males

29–30 . . . . . . . . . . . . 0.001372

30–31 . . . . . . . . . . . . 0.001399

non hispanic white population

29–30 . . . . . . . . . . . . 0.001083

30–31 . . . . . . . . . . . . 0.001116

non hispanic white males

29–30 . . . . . . . . . . . . 0.001477

30–31 . . . . . . . . . . . . 0.001503

jacob, non hispanic white male. 30 years old.

probability that jacob lives to be 30 years old.

since the given probabilities are probabilities of dying, i think we simply subtract it from 1 to get the probability of living. we will use the probability of non hispanic white male.

probability of living to be 30 y.o.

29 - 30 : 1 - 0.001477 = 0.998523

30 - 31 : 1 - 0.001503 = 0.998497

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