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MrRissso [65]
2 years ago
6

Find the surface area of the composite figure.

Mathematics
1 answer:
Fynjy0 [20]2 years ago
3 0

Answer:

132cm²

Step-by-step explanation:

Split into two shape: Cube & Triangle prism

Cube surface area:

1) area of top & bottom

(4×3)×2= 12×2= 24cm²

2) area of the sides (only three sides as for surface)

(3×6)×3= 18×3= 54cm²

Triangle prism surface area:

1) area of two sides of triangle:

(½×6×4)×2= (3×4)×2= 12×2= 24cm²

2) area of two sides of rectangle:

(5×3)×2= 15×2= 30cm2

Total surface area: 24+54+24+30= 132cm²

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What is the height of the triangle 35 and 819
kakasveta [241]
I don’t know what answers you have but I think it’s 23.4
4 0
3 years ago
A chemist is using 336 milliliters of a solution of acid and water. If 19.4 % of the solution is acid, how many milliliters of a
denpristay [2]

Answer:

65.2 milliliters

Step-by-step explanation:

The quantity 336 milliliters is the 100% of the solution. We can represent this information on a table:

Milliliters        Percentage of solution

     336        ⇔            100%

we are told that 19.4% of this solution is acid, and we need to know how many milliliters represents this percentage. I will call the number of milliliters of acid on the solution 'x', and updating the last table:

Milliliters        Percentage of solution

     336        ⇔            100

     x             ⇔            19.4%

We can solve this problem for 'x' using the<u> rule of three</u> which is to multiply the cross quantities on the table (336 by 19.4) and then divide by the remaining amount (100):

x = 336(19.4)/100

x = 6,518.4/100

x = 65.184

which rounding to the nearest tenth is: 65.2 milliliters

8 0
3 years ago
An art dealer is trying to determine whether the age of a painting plays a significant role in its price at auction. She collect
klasskru [66]

Answer:

-0.20

Step-by-step explanation:

Given the data:

Age at auction (x) ____price sold (y)

391

51

32

84

47

104

88

43

470

51

Y:

76.9

95.4

86.3

49.3

80

57

47.8

80

70

86.9

General formula for a simple linear regression :

y = ab + c

Where ;

y = predicted variable ; a = slope / gradient

b = predictor / independent variable ; c = intercept

From the result obtained from the calculator :

y = -0.01246X + 74.65552

Correlation Coefficient is used to measure the strength of relationship between linear variables.

The regression Coefficient obtained is - 0.20

This shows that there is a weak negative correlation between the age at auction and the price at which painting is sold. This is because the negative sign means that value of y decreases as x increases or vice versa, however, due to a correlation vale which is closer to 0 than 1 or - 1, we can conclude that the negative relationship between the variables is weak.

5 0
3 years ago
Could somebody help me on the 2 question please
ozzi
-20 because after the the thermometer hits zero the more negative the temperature gets the colder it is
8 0
3 years ago
Read 2 more answers
Solve the system using substitution. Write the solution as an ordered pair. (1 point) SHOW YOUR WORK FOR FULL CREDIT! (2 points)
beks73 [17]

x = -2

y = 7

Solution: (-2,7)

//Hope this helps.

3 0
3 years ago
Read 2 more answers
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