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4 years ago

Please answer and explain

Mathematics

1 answer:

Ludmilka [50]4 years ago

7 0

Answer:

Step-by-step explanation:

They are trying to deceive you into not choosing the star that is largest when written as 10^17.

When you rewrite the givens so that the power is 10^17 then the table will look like this.

1.76 * 10^17

2.213 * 10^17

3.142 * 10^17

1.255 * 10^14

It obviously isn't D.

It should be C

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(a + 3)(a - 2) whats the answer

const2013 [10]

(a+3)(a-2)

a^2-2a+3a-6

a^2+a-6

Answer is a^2+a-6

4 0

3 years ago

Read 2 more answers

Vaimiti walks at a constant pace of 1.1 m/s and takes 25 minutes to get to school.

Temka [501]

Solution:

Note that:

Speed = Distance/Time
Vaimiti speed = 1.1 m/s
Jabril speed = 1.3 m/s

Converting the time (minutes to seconds) for Vaimiti to reach school:

Vaimiti's time to reach school: 25 minutes = 25 x 60 seconds
=> Vaimiti's time to reach school: 1500 seconds

Converting the time (minutes to seconds) for Jabril to reach school:

Jabril's time to reach school: 30 minutes = 30 x 60 seconds
=> Jabril's time to reach school: 1800 seconds

Finding the distance of Vaimiti:

Speed = Distance/Time

Important: The distance will be in meters since the speed units is meters/seconds.

=> 1.1 meters/second = Distance/1500
=> 1.1 x 1500 = Distance
=> 1650 meters = Distance (In meters)

Finding the distance of Jabril:

Speed = Distance/Time

Important: The distance will be in meters since the speed units is meters/seconds.

1.3 meters/second = Distance (In meters)/1800 seconds
=> 1.3 x 1800 = Distance (In meters)
=> 2340 meters = Distance (In meters)

This can lead to two possible solutions:

Possible solution #1:

Finding the difference between the two distances:

2340 meters - 1650 meters = Difference (In meters)
=> 690 meters

Possible solution #2:

The difference between the distances they walked is that Jabril walked faster than Vaimiti, but Vaimiti reached school earlier than Jabril because the walking distance for Vaimiti is less than the walking distance for Jabril.

Hoped this helped!

6 0

3 years ago

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-(x/4)=-8 what does x equal? can you explain how you got the answer?

snow_tiger [21]

I believe the answer is x=32.

7 0

3 years ago

Find the probability

zalisa [80]

Answer:

33.3333%

Step-by-step explanation:

each side would be 50% and if one side is split between three it would equal if it was 16.6667 each

since tehre are two red sides multiply 16.6667 by 2 and u get 33.3333%

8 0

3 years ago

A screening examination was performed on 250 persons for Factor X, which is found in disease Y. A definitive diagnosis for disea

ZanzabumX [31]

Answer:

The specificity of this test is expressed as:________

70%.

Step-by-step explanation:

a) Data and Calculations:

TEST RESULTS Disease Present Disease Absent Total

Positive for Factor X 40 60 100

Negative for Factor X 10 140 150

Total 50 200 250

Negative for X and Disease Absent = 140/200 * 100

= 0.7 * 100

= 70%

b) The specificity refers to the percentage of people who test negative for a specific disease among a group of people who do not have the disease. No test is 100% specific because some people who do not have the disease X will test positive for it (false positive). Therefore, we are testing for the true negative, that the 140 people who tested out of the 200 people who do not have the disease.

8 0

3 years ago