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Mademuasel [1]
3 years ago
11

While walking home on a dark night, Joanna saw a bright light in the sky and concluded that it must have been a spaceship from a

nother planet. Which of these questions could Joanna answer using scientific methods of investigation?
A) Can aliens read our minds?
B) Does Joanna actually believe in aliens?
C) What is the aliens spacecraft made from?
D) What percent of people in the area saw a bright light that night?
Mathematics
2 answers:
ikadub [295]3 years ago
6 0
C i believe. hope this helps :)
vekshin13 years ago
4 0
D makes sense because it's the only option that is using a legitimate form of data collection.
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A train traveled 325 miles in 5 hours. What was the trains average rate of speed in miles per hour?
EleoNora [17]
The train went 65 miles per hour.
3 0
3 years ago
given that a1=5 and a2=15 are the first two terms of a geometric sequence, determine the values of a3 and a10. Show the calculat
Alekssandra [29.7K]

a_3 is 45 and a_10 is 98415

Step-by-step explanation:

Given

a_1 = 5

a_2 = 15

First of all we have to calculate the common ratio of the sequence. The common ratio is the ratio between two consecutive terms of a geometric sequence.

So,

r=\frac{a_2}{a_1} = \frac{15}{5} = 3

The explicit formula for geometric sequence is:

a_n = a_1.r^{n-1}

Putting the value of r and a_1

a_n = 5.(3)^{n-1}

Putting n=3 in the explicit formula

a_3 =5.3^{3-1}\\= 5 * 3^2\\=5 * 9\\= 45

Putting n=10 for tenth term

a_{10} =5.3^{10-1}\\=5*3^9\\=5 * 19683\\=98415

Hence,

a_3 is 45 and a_10 is 98415

Keywords: Geometric sequence, Explicit formula

Learn more about geometric sequence at:

  • brainly.com/question/10978510
  • brainly.com/question/11007026

#LearnwithBrainly

7 0
3 years ago
Addition (must show work) can someone solve 1. m + 13 =29 2. z + x =34 <br><br> 3. 87 + p = 136
azamat

Greetings ! Your Answer Is Below.

Answer;

1. m = 16

2. x = -z + 34 or z = -x + 34

3. p = 49

Step-by-step explanation;

1. m + 13 - 13 = 29 - 13       | Subtract 13 from both sides ( m = 16 )

2. - z + 34                          | Add -z to both of the sides ( x = - z + 34 )

Or - x + 34                         | Add -x to both of the sides ( z = - x + 34 )

3. 136 - 87 = 49                 | Subtract 87 from both sides ( p = 49 )

[ Hope This Helped ! ]

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2 years ago
20% of your employees work part time
DerKrebs [107]
C. 1/5 is the fraction of employees that work part time.

4 0
3 years ago
Read 2 more answers
Find the measure of angle x in the figure below:
patriot [66]
100 degrees - all angle measurements in a triangle will add up to 180 degrees (45+55 = 100, 180-100 = 80)
5 0
2 years ago
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