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Kay [80]
2 years ago
5

Explain and Answer!!!!

Mathematics
2 answers:
avanturin [10]2 years ago
8 0
The area of the composite figure is 610 cm squared
Gnom [1K]2 years ago
4 0

Divide the arrow into upper triangle and lower rectangle

area of triangle :-

\frac{1}{2}  \times base  \times height

\frac{1}{2}  \times 20 \times (15 + 8 + 8)  \\  \frac{1}{2}  \times 20 \times 31 = 310

area of rectangle :-

length \:  \times  \: width \\ 15 \times 20 = 300

add both the area :-

area of triangle+ area of rectangle = area of arrow

310 + 300 = 610 cm²

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If a = band b = c, which statement must be true?
sammy [17]

Answer:

if a = b and b= c then a,b and c are all equal

7 0
3 years ago
An experiment has a high degree of ______________ when it shows convincingly that changes in behavior are a function of the inde
adelina 88 [10]

The answer is Internal Validity.

Internal Validity is high in an experiment. when it demonstrates persuasively that changes in behavior are caused by the independent variable and not by unknown factors.

What is Internal Validity?

  • Internal validity is defined as the degree to which the observed results represent the truth in the population under investigation and are not the consequence of methodological flaws.
  • Internal validity is the degree of certainty that the causal link being examined is reliable and unaffected by other factors or variables.
  • The extent to which study results may be extended (generalized) to other contexts, groups, or events is referred to as external validity.

To learn more about Internal Validity visit:

brainly.com/question/9292757

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5 0
1 year ago
a recipe calls for 32 fluid ounces of heavy cream. how many 1-pint containers of heavy cream are needed to make the recipe?
Lorico [155]
Two pints because there are sixteen ounces in a pint and when you divide 32 by 16 you get 2.
5 0
3 years ago
The function f(x) = −16x2 + 112 models the height, in feet, of an
natima [27]

For this, just plug in 1.5 into the x variable of this function and solve as such:

f(1.5)=-16*1.5^2+112\\f(1.5)=-16*2.25+112\\f(1.5)=-36+112\\f(1.5)=76

<u>The height of the object was at 76 ft.</u>

3 0
3 years ago
Listed below are the numbers of hurricanes that occurred in each year in a certain region. The data are listed in order by year.
Drupady [299]

Answer:

Range = 13

Variance = 10.22

Standard deviation = 3.20

Since this data is time-series therefore, the measures of variation do not reveal anything about the pattern of hurricanes over time.

Step-by-step explanation:

We are given the number of hurricanes that occurred in each year in a certain region.

8 9 8 7 9 15 5 6 8 4 12 7 8 2

Range:

The range of the data set is found by

Range = Maximum value - minimum value

The maximum value in the data set is 15

The minimum value in the data set is 2

Range = 15 - 2

Range = 13

Variance:

To find the variance, first compute the mean of the data set.

Mean = Sum/n

Mean = (8+9+8+7+9+15+5+6+8+4+12+7+8+2)/14

Mean = 108/14

Mean = 7.714

The variance is given by

σ² = (x - mean)²/(n - 1)

σ² = (8 - 7.714)² + (9 - 7.714)²+ (8 - 7.714)² + (7 - 7.714)² + (9 - 7.714)² + (15 - 7.714)² + (5 - 7.714)² + (6 - 7.714)² + (8 - 7.714)² + (4 - 7.714)² + (12 - 7.714)² + (7 - 7.714)² + (8 - 7.714)² + (2 - 7.714)²/(14 - 1)

σ² = 10.22

Standard deviation:

The standard deviation of the data set is given by

σ² = √σ

σ² = √10.22

σ² = 3.20

Since this data is time-series therefore, the measures of variation do not reveal anything about the pattern of hurricanes over time.

7 0
3 years ago
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