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igomit [66]
2 years ago
5

Eight male and eight female college students who have credit cards were surveyed and asked their total credit card debt. The res

ponses are given below in dollars: Males 1000 2100 900 1200 1300 500 1400 700 Females 1300 500 2000 1800 1300 1000 2600 1400
Is this an observational study or a designed experiment?
Mathematics
1 answer:
Tatiana [17]2 years ago
5 0

Answer:

Observational study.

Step-by-step explanation:

In an observational study, the data is calculated but there are no experiments to change anything.

In a designed experiment, an experiment is applied to a group of people and it's effects are studied.

In this problem, we have that:

Male and female college students give their total credit card debt. There are no experiments to change anything. So it is an observational study.

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If 40% of a number is 112 and 95% of the same number is 266, find 55% of that number.
damaskus [11]

Answer:

154

Step-by-step explanation:

.4 x 112 = 280

.95 x 266 = 280

.55 x 280 = 154

5 0
3 years ago
What is the area in square units of the rectangle
Vsevolod [243]
\bf \textit{area of a rectangle}\\\\
A=length\cdot width\qquad \qquad A=\cfrac{3}{7}\cdot \cfrac{2}{9}\implies A=\cfrac{6}{63}\implies A=\cfrac{2}{21}
8 0
3 years ago
Tyler has 2 dogs and 7 fish. What is Tyler's ratio of fish to dogs?
sergij07 [2.7K]

Answer:

2:7

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Liam has a points card for a movie theater.
ra1l [238]

The  number of visits Liam can make to earn his first free movie ticket is: 8.4.

<h3>Number of visits Liam can make</h3>

Let x represent the number of visits

Formula
55+12.5×x=160

Re-arrange

12.5x=160-55

12.5x=105

Divide both side by 12.5x

x=105/12.5

x=8.4 visits

Therefore the  number of visits Liam can make to earn his first free movie ticket is: 8.4.

Learn more about Number of visits Liam can make here:brainly.com/question/18350673

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6 0
1 year ago
Evaluate -a - 12a 2 for a = -1
Serhud [2]
The answer is -11
You put "-1" in place of all the "a"s and get 
-(-1) - 12(-1)^2
-(-1) is just 1, and (-1)^2 is "1"
We are then left with 1-12(1) which is 1-12 which is -11
6 0
2 years ago
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