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Stella [2.4K]
3 years ago
11

You roll a standard number cub. Find P(3 or 4)

Mathematics
1 answer:
Vsevolod [243]3 years ago
8 0

Answer:

If this is a 6 sided fair die, P = 1/3

Step-by-step explanation:

Fair means you have an equal chance of getting each option. P(3 and 4) = P(3) + P(4) = 1/6 + 1/6 = 2/6 = 1/3.

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It takes Mr. Martin 12 minutes to drive his bus route without stopping to pick up any passengers. For each passenger stop, he es
vlada-n [284]

It is given that Mr Martin takes 12 minutes to drive his bus route without stopping on any of the stops.

On Tuesday, it took him 14 minutes when he stooped to take the passengers. He estimated that it takes 30 sec for each stop.

60 second = 1 minute.

30 second = 0.5 minutes.

Let us assume, there were x stops.

Since it takes him 12 minutes without stopping, 12 minutes here acts as a fixed time.

Total time is given by the equation

y=0.5x+12 .... (1)

where t is the total time and x is the number of passengers.

To find the number of passengers, solve equation (1) for x ,

x=\frac{y-12}{0.5} .... (2)

Plug y= 14 into equation number  (2) gives 4 stops.

5 0
3 years ago
How do you write 8.1 x 104 in standard form?
Dovator [93]

Answer:4025

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
a pyramid has a height of 5 in and a surface area of 90 in find the surface area of a simuler pyamied with a height fo 10
egoroff_w [7]
I think the answer would be 180

5*2=10 90*2=180
7 0
4 years ago
If 4x = 8, then x = 2.
seraphim [82]

Answer:

true

Step-by-step explanation:

4(2)=8, and 4 times 2 =8

4 0
4 years ago
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In auto racing a pit stop is is where a racing vehicle stops for new tires and repairs and other mechanical adjustments. The eff
Dahasolnce [82]

Answer:

a) H_{0}: t=13 seconds

   H_{a}: t<13 seconds

b) At α= 0.01, one-tailed critical value is -2.33

c) Test statistic is −2,98

d) since -2.98<-2.33, we can reject the null hypothesis. There is significant evidence that mean pit stop time for the pit crew is less than 13 seconds at α= 0.01.

Step-by-step explanation:

according to the web search, the question is missing some words, one part should be like this:

"A pit crew claims that its mean pit stop time ( for 4 new tires and fuel) is less than 13 seconds."

Let t be the mean pit stop time of the pit crew.

H_{0}: t=13 seconds

H_{a}: t<13 seconds

At α= 0.01, one-tailed critical value is -2.33

Test statistic can be calculated using the equation:

z=\frac{X-M}{\frac{s}{\sqrt{N} } } where

  • X is the sample mean pit stop time (12.9 sec)
  • M is the mean pit stop time assumed under null hypothesis (13 sec)
  • s is the population standard deviation (0.19 sec.)
  • N is the sample size (32)

Then z=\frac{12.9-13}{\frac{0.19}{\sqrt{32} } } ≈ −2,98

since -2.98<-2.33, we can reject the null hypothesis. There is significant evidence that mean pit stop time for the pit crew is less than 13 seconds at α= 0.01.

8 0
3 years ago
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