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3 years ago

Can someone turn 2,724.7 into a scientific notation?

Mathematics

1 answer:

Svetach [21]3 years ago

3 0

Answer:

2.7247 x 10^3

Step-by-step explanation:

Move the decimal as many spaces to the left until it is behind the first number.

Count how many spaces you moved.

Put that number as the power of x 10^?

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Please help me with this

mafiozo [28]

Answer:

Step-by-step explanation:

Let:

s - side of the square

d - diameter of the circle

r - radius of a circle

C - circumeference of the circle

AC - area of the circle

AS - area of a square

The formula of a perimeter of a square:

P = 4s

We have P = 40cm.

Substitute:

4s = 40 divide both sides by 4

s = 10 cm

The length of the diameter of the circle inscribed in the square is equal to the length of the side of the square.

Therefore d = s → d = 10 cm.

The length of the circle diameter is two lengths of the circle radius.

Therefore d = 2r → r = d : 2 → r = 10 : 2 = 5 cm.

The formula of a circumference of a circle:

C = dπ.

Substitute d = 10cm, and π = 3.14.

C = 10(3.14) = 31.4 cm.

The formula of an area of a circle:

AC = πr²

Substitute r = 5cm and π = 3.14

AC = 3.14(5²) = 3.14(25) = 78.5 cm².

The formula of an area of a square:

AS = s²

Substitute s = 10 cm

AS = 10² = 100 cm²

6 0

4 years ago

!! PLEASE HELP, TIMED!!Multiple choice, BRAINLIEST for correct answer. Explain answer

Alenkinab [10]

Answer:

Its odd

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

In the diagram, angle abc is a right angle. Find the value of x Show full working out pls ty

Vladimir79 [104]

Answer:

x = 3.75

Step-by-step explanation:

ABC is a right angled triangle.

Therefore, by Pythagoras theorem:

${(10 - x)}^{2} = {x}^{2} + {5}^{2} \\ 100 - 20x + {x}^{2} = {x}^{2} + 25 \\ 100 - 20x = 25 \\ - 20x = 25 - 100 \\ - 20x = - 75 \\ x = \frac{ - 75}{ - 20} \\ \: \: \huge \red { \boxed{x = 3.75}}$

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3 years ago

Families USA, a monthly magazine that discusses issues related to health and health costs, survey 19 of its subscribers. It foun

s344n2d4d5 [400]

Answer:

$10,151 $< \mu$ $11448.12

$n = 158$

Step-by-step explanation:

From the question we are told that

The sample size is n = 19

The sample mean is $\= x =$ $10,800

The standard deviation is $\sigma =$ $1095

The population mean is $\mu =$ $225

Given that the confidence level is 99% the level of significance is mathematically represented as

$\alpha = 100 -99$

$\alpha = 1$ %

=> $\alpha = 0.01$

Now the critical values of $\alpha = Z_{\frac{\alpha }{2} }$ is obtained from the normal distribution table as

$Z_{\frac{0.01}{2} } = 2.58$

The reason we are obtaining values for $\frac{\alpha }{2}$ is because $\alpha$ is the area under the normal distribution curve for both the left and right tail where the 99% interval did not cover while $\frac{\alpha }{2}$ is the area under the normal distribution curve for just one tail and we need the value for one tail in order to calculate the confidence interval