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aleksklad [387]

3 years ago

5

4/5 as a decimal and How did you decide when you have calculated enough decimal places?

2 answers:

olga2289 [7]3 years ago

4 0

Make 4/5 into 8/10 which would make the decimal .8.

marysya [2.9K]3 years ago

3 0

Answer: .80

Step-by-step explanation: When we take the number 1 as a whole and divide it by 5 it equals .20. Or take 100 as the whole and divided by 5 is 20 Now you want 4 out of the 5 sections, and each section is .2 or 20, so you multiply that by 4 and for 4/5 the decimal is .80

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The radius of a cylindrical vessel is 7 cm and height is 1400 m . Find the cost of painting its inner curved surface area at the

Olegator [25]

Answer:

Cost = 616000 DHS per square centimetre.

Step-by-step explanation:

curved surface of a cylinder = 2 $\pi$ rh

r = 7 cm

h = 1400 m = 140000 cm

The outer curved surface area of the cylinder = inner curved surface area of the cylinder

The inner curved surface of the cylinder = 2 $\pi$ rh

= 2 x $\frac{22}{7}$ x 7 x 140000

= 2 x 22 x 1 x 140000

= 6160000

The inner curved surface of the cylinder is 6160000 square centimetre.

But, the cost of painting is at the rate of 10 DHS per square centimetre.

The inner curved surface of the cylinder = 6.16 x $10^{6}$ square centimetre.

cost of painting the inner curved surface area = $\frac{6.16*10^{6} }{10}$

= 616000 DHS per square centimetre

The cost of painting the inner surface is 616000 DHS per square centimetre.

6 0

2 years ago

The formula for the circumference of a circle is C = 2xr. If the circumference is

vredina [299]

Answer:

774.4

Step-by-step explanation:

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2 years ago

Randys garden has 3 rows of carrot with 3 plants in each row. next year he plans to plant 4 times the number of rows of 3 plants

Gnesinka [82]

He will have 36 plants next year.
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5 0

3 years ago

1 in 103 shoppers bought a soup. What is the percentage?

zvonat [6]

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0.970873786408%

Step-by-step explanation:

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2 years ago

Imagine a regression line that relates y = average systolic blood pressure to x = age. The average blood pressure for people 40

mart [117]

Answer:

2.0

Step-by-step explanation:

x = age

y = average systolic blood pressure

x₁ = 40 years old, y₁ = 110 systolic blood pressure

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$\text{Slope of a line}=m=\frac{y_2-y_1}{x_2-x_1}\\\Rightarrow m= \frac{130-110}{50-40}\\\Rightarrow\frac{20}{10}\\\Rightarrow m= 2.0$

∴ Slope of the regression line is 2.0

4 0

3 years ago